Patents by Inventor David L. Campbell

David L. Campbell has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20240366370
    Abstract: Described embodiments are directed toward centrally-opening leaflet prosthetic valve devices having synthetic leaflets that are configured to promote and encourage tissue ingrowth thereon and/or therein. The leaflets are coupled to a leaflet frame to form a prosthetic valve suitable for use in biological anatomy.
    Type: Application
    Filed: July 18, 2024
    Publication date: November 7, 2024
    Inventors: Karl Busalacchi, Benjamin D. Campbell, Kyle W. Colavito, Carl M. Conway, Cody L. Hartman, Roy Manygoats, JR., Frank E. Myers, Vi T. Pham, Joshua A. Sprinkle, David M. Warlop, Nathan L. Bennett
  • Patent number: 12132273
    Abstract: Electrical connector systems and methods create an electrical connection between a flexible circuit (FC) and a metal terminal of another connector. A reliable electrical connection is achieved with a low-cost tin contact plating, by an automatic FC to metal terminal wiping action with contact force, during the connector to FC assembly process. The connector to FC assembly process is also well suited for automated robotic assembly, which can save costs compared to manual assembly/installation.
    Type: Grant
    Filed: March 15, 2022
    Date of Patent: October 29, 2024
    Assignee: APTIV TECHNOLOGIES AG
    Inventors: Jeffrey S. Campbell, Wesley W. Weber, Duane L. Brantingham, Kurt P. Seifert, David R. Peterson, Joon Lee
  • Publication number: 20240286347
    Abstract: An apparatus suitable for extruding curable polymers for forming elastomer articles using additive manufacturing, and curable fluorine-containing polymer compositions suitable for use in such an apparatus are disclosed along with an additive manufacturing method for forming a fluorine-containing elastomer including providing a curable fluoropolymer composition, comprising at least one curable fluoropolymer; providing an additive manufacturing printer apparatus comprising a ram material extruder, wherein the ram material extruder comprises a ram device operable for extrusion under pressure and a printer nozzle; introducing the curable fluoropolymer composition to the ram material extruder; applying heat to the ram device, including the printer nozzle thereof; and applying pressure to the ram device to extrude the curable fluoropolymer composition; and printing, using the additive manufacturing printer apparatus, at least one layer of the extruded curable fluoropolymer composition exiting from an outlet of the
    Type: Application
    Filed: November 14, 2023
    Publication date: August 29, 2024
    Applicant: Greene,Tweed Technologies, Inc.
    Inventors: Mookkan Periyasamy, Ronald R. Campbell, Joey L. Mead, David O. Kazmer, Stiven Kodra, A. A. Mubasshir
  • Patent number: 12053374
    Abstract: Described embodiments are directed toward centrally-opening leaflet prosthetic valve devices having synthetic leaflets that are configured to promote and encourage tissue ingrowth thereon and/or therein. The leaflets are coupled to a leaflet frame to form a prosthetic valve suitable for use in biological anatomy.
    Type: Grant
    Filed: August 10, 2022
    Date of Patent: August 6, 2024
    Assignee: EDWARDS LIFESCIENCES CORPORATION
    Inventors: Karl Busalacchi, Benjamin D. Campbell, Kyle W. Colavito, Carl M. Conway, Cody L. Hartman, Roy Manygoats, Jr., Frank E. Myers, Vi T. Pham, Joshua A. Sprinkle, David M. Warlop, Nathan L. Bennett
  • Patent number: 9261320
    Abstract: Magazine block device for firearm dry fire practice which allows a user to practice proper firearm handling skills without expending ammunition, including recocking and actuating the firearm slide without pressing the slide lock release. In an aspect, a magazine block device is provided having a bullet-shaped body, two upper ridges forming a longitudinal channel through which the firearm breach face loading tab may pass without dislodging the magazine block device, and an offset lower ridge. The lower ridge is configured to evenly force a magazine follower down a sufficient distance to prevent actuation of the firearm slide lock. This allows dry fire practice of pulling the slide. Several other features include ridges to assist a user to remove and load the block device in and out of a magazine, as well as a pocket to mechanically remove same.
    Type: Grant
    Filed: July 18, 2014
    Date of Patent: February 16, 2016
    Assignee: Rogers Holster Co., LLC
    Inventors: David L. Campbell, William H. Rogers, Matthew E. McKendrick
  • Publication number: 20150198404
    Abstract: Magazine block device for firearm dry fire practice which allows a user to practice proper firearm handling skills without expending ammunition, including recocking and actuating the firearm slide without pressing the slide lock release. In an aspect, a magazine block device is provided having a bullet-shaped body, two upper ridges forming a longitudinal channel through which the firearm breach face loading tab may pass without dislodging the magazine block device, and an offset lower ridge. The lower ridge is configured to evenly force a magazine follower down a sufficient distance to prevent actuation of the firearm slide lock. This allows dry fire practice of pulling the slide. Several other features include ridges to assist a user to remove and load the block device in and out of a magazine, as well as a pocket to mechanically remove same.
    Type: Application
    Filed: July 18, 2014
    Publication date: July 16, 2015
    Inventors: David L. Campbell, William H. Rogers, Matthew E. McKendrick
  • Patent number: 7730089
    Abstract: A method and system for providing remote access to the facilities of a server computer are provided. A site integration application programming interface at a co-branded Web site. The site integration application programming interface exposes a number of servlets that may be executed in response to requests received from a business partner Web site over a secure communications link. The servlets provide functionality for accessing the user registration and deletion facilities of the co-branded Web site. Moreover, the servlets also provide access to other administrative facilities provided at the co-branded Web site. The servlets also provide functionality for authorizing a user to access the co-branded we site. This servlet may be executed in conjunction with the login facilities of the business partner web site to permit concurrent login at both sites.
    Type: Grant
    Filed: August 10, 2001
    Date of Patent: June 1, 2010
    Assignee: Punch Networks Corporation
    Inventors: R. David L. Campbell, Paul E. Onnen, Edward M. Sarausad, Steven W. Plate
  • Publication number: 20020111942
    Abstract: A method and system for providing remote access to the facilities of a server computer are provided. A site integration application programming interface at a co-branded Web site. The site integration application programming interface exposes a number of servlets that may be executed in response to requests received from a business partner Web site over a secure communications link. The servlets provide functionality for accessing the user registration and deletion facilities of the co-branded Web site. Moreover, the servlets also provide access to other administrative facilities provided at the co-branded Web site. The servlets also provide functionality for authorizing a user to access the co-branded we site. This servlet may be executed in conjunction with the login facilities of the business partner web site to permit concurrent login at both sites.
    Type: Application
    Filed: August 10, 2001
    Publication date: August 15, 2002
    Applicant: Punch Networks Corporation
    Inventors: R. David L. Campbell, Paul E. Onnen, Edward M. Sarausad, Steven W. Plate
  • Patent number: 6377951
    Abstract: An on-line database updating network system and method using object-oriented programming to build a program of discrete blocks, with each block being separately accessible, modifiable, and replaceable. The system includes a user terminal, a host terminal, and a communications channel. Origin dates of user module blocks of information stored in the user terminal are compared, over the communications channel, with origin dates of corresponding host module blocks of information stored in the host terminal. Host module blocks having origin dates more recent than corresponding user module blocks are downloaded as updated blocks over the communications channel to the user terminal. The downloaded updated blocks are then used to update the relevant user module blocks of information. Alternate host terminals may also be accessed by the user terminal, and updated alternate host module blocks of information may be downloaded to the user terminal.
    Type: Grant
    Filed: August 6, 1999
    Date of Patent: April 23, 2002
    Assignee: Punch Networks Corporation
    Inventor: R. David L. Campbell
  • Publication number: 20010054099
    Abstract: An information distribution program (36) is provided for automatically distributing information over a network (24) connecting a plurality of computers (15). Each computer (15) is installed with the information distribution program (36), which comprises a family construction module (44), a publication module (40), a subscription module (42), and an information tree (46). The information tree (46) stores the most recent information available to the computer (15). The family construction module (44) organizes the various computers (15) connected to the network (24) into immediate and extended families of related computers (15). The publication module (40) automatically distributes, “publishes” or “pushes” the information to the immediate and extended family members of a computer (15) which have shown an interest in the information.
    Type: Application
    Filed: March 6, 2001
    Publication date: December 20, 2001
    Applicant: Punch Networks Corporation
    Inventors: R. David L. Campbell, Roland Faragher-Horwell
  • Publication number: 20010020250
    Abstract: An information distribution program (36) is provided for automatically distributing information over a network (24) connecting a plurality of computers (15). Each computer (15) is installed with the information distribution program (36), which comprises a family construction module (44), a publication module (40), a subscription module (42), and an information tree (46). The information tree (46) stores the most recent information available to the computer (15). The family construction module (44) organizes the various computers (15) connected to the network (24) into immediate and extended families of related computers (15). The publication module (40) automatically distributes, “publishes” or “pushes” the information to the immediate and extended family members of a computer (15) which have shown an interest in the information.
    Type: Application
    Filed: March 6, 2001
    Publication date: September 6, 2001
    Inventors: R. David L. Campbell, Roland Faragher-Horwell
  • Patent number: 6240451
    Abstract: An information distribution program (36) is provided for automatically distributing information over a network (24) connecting a plurality of computers (15). Each computer (15) is installed with the information distribution program (36), which comprises a family construction module (44), a publication module (40), a subscription module (42), and an information tree (46). The information tree (46) stores the most recent information available to the computer (15). The family construction module (44) organizes the various computers (15) connected to the network (24) into immediate and extended families of related computers (15). The publication module (40) automatically distributes, “publishes” or “pushes” the information to the immediate and extended family members of a computer (15) which have shown an interest in the information.
    Type: Grant
    Filed: November 12, 1997
    Date of Patent: May 29, 2001
    Assignee: Punch Networks Corporation
    Inventors: R. David L. Campbell, Roland Faragher-Horwell
  • Patent number: 5937405
    Abstract: An on-line database updating network system and method using object-oriented programming to build a program of discrete blocks, with each block being separately accessible, modifiable, and replaceable. The system includes a user terminal, a host terminal, and a communications channel. Origin dates of user module blocks of information stored in the user terminal are compared, over the communications channel, with origin dates of corresponding host module blocks of information stored in the host terminal. Host module blocks having origin dates more recent than corresponding user module blocks are downloaded as updated blocks over the communications channel to the user terminal. The downloaded updated blocks are then used to update the relevant user module blocks of information. Alternate host terminals may also be accessed by the user terminal, and updated alternate host module blocks of information may be downloaded to the user terminal.
    Type: Grant
    Filed: November 12, 1997
    Date of Patent: August 10, 1999
    Assignee: Punch Networks Corporation
    Inventor: R. David L. Campbell
  • Patent number: 5694596
    Abstract: An on-line database updating network system and method using object-oriented programming to build a program of discrete blocks, with each block being separately accessible, modifiable, and replaceable. The system includes a user terminal, a host terminal, and a communications channel. Origin dates of user module blocks of information stored in the user terminal are compared, over the communications channel, with origin dates of corresponding host module blocks of information stored in the host terminal. Host module blocks having origin dates more recent than corresponding user module blocks are downloaded as updated blocks over the communications channel to the user terminal. The downloaded updated blocks are then used to update the relevant user module blocks of information. Alternate host terminals may also be accessed by the user terminal, and updated alternate host module blocks of information may be downloaded to the user terminal.
    Type: Grant
    Filed: May 25, 1995
    Date of Patent: December 2, 1997
    Assignee: Kangaroo, Inc.
    Inventor: R. David L. Campbell
  • Patent number: 5656970
    Abstract: An output driver including pull-up and pull-down output transistors is formed in a silicon substrate. The source and the drain of the pull-up output transistor are formed in a common bulk region of the substrate. A bulk potential control circuit for controlling the voltage of the bulk region, a resistive element and a gate drive control circuit are also formed in the silicon substrate. A layer of interconnect formed over a top surface of the silicon substrate may selectively couple into the output driver circuit one or more of the resistive element between a source of the pull-down output transistor and a reference voltage source, the bulk potential control circuit to control the voltage of the bulk region of the silicon substrate, and the gate drive control circuit to control the rate of change of voltage on the gate of the pull-down transistor as a function of the voltage on this gate.
    Type: Grant
    Filed: March 14, 1995
    Date of Patent: August 12, 1997
    Assignee: Integrated Device Technology, Inc.
    Inventors: David L. Campbell, James E. Fox, Jr.
  • Patent number: 5594361
    Abstract: A hysteresis circuit comprises a first logic section, a second logic section cascaded with the first logic section, and circuitry for controlling hysteresis threshold voltages of the hysteresis circuit. The hysteresis controlling circuitry conducts current from a source of a first supply voltage to the output lead of the first logic section during a low-to-high transition of an input voltage on an input terminal of the hysteresis circuit. The hysteresis controlling circuitry conducts current from the output lead of the first logic section to a source of a second supply voltage during a high-to-low transition of the input voltage on the input terminal of the hysteresis circuit. A clock generator integrated circuit chip employing the hysteresis circuit in a voltage controlled oscillator can generate squarewave signals of 150 MHz onto a plurality of output terminals when powered from approximately 3.3 volts throughout a 0 to 70 degree Celsius temperature range, a clock skew of less than 0.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: January 14, 1997
    Assignee: Integrated Device Technology, Inc.
    Inventor: David L. Campbell
  • Patent number: 5546033
    Abstract: An output driver circuit capable of driving its data output terminal to a digital logic level high, capable of driving its data output terminal to a digital logic level low, and capable of tristating its data output terminal has an output stage comprising a pullup field effect transistor (FET) and a like-polarity pulldown FET. The two pullup and pulldown FETs are coupled in series between two voltage supply lines. In one aspect of the invention, the output driver comprises a charge rate control circuit which charges the gate of the pulldown FET when the pulldown FET is to be turned on so that the voltage on the gate increases at a first rapid rate and then increases at a second slower rate after the pulldown FET begins to conduct current. In another aspect of the invention, a resistive element is provided between the source of the pulldown FET and a ground voltage supply line.
    Type: Grant
    Filed: July 14, 1995
    Date of Patent: August 13, 1996
    Assignee: Integrated Device Technology, Inc.
    Inventors: David L. Campbell, James E. Fox, Jr.
  • Patent number: 5459437
    Abstract: A hysteresis circuit comprises a first logic section, a second logic section cascaded with the first logic section, and circuitry for controlling hysteresis threshold voltages of the hysteresis circuit. The hysteresis controlling circuitry conducts current from a source of a first supply voltage to the output lead of the first logic section during a low-to-high transition of an input voltage on an input terminal of the hysteresis circuit. The hysteresis controlling circuitry conducts current from the output lead of the first logic section to a source of a second supply voltage during a high-to-low transition of the input voltage on the input terminal of the hysteresis circuit. A clock generator integrated circuit chip employing the hysteresis circuit in a voltage controlled oscillator can generate squarewave signals of 150 MHz onto a plurality of output terminals when powered from approximately 3.3 volts throughout a 0 to 70 degree Celsius temperature range, a clock skew of less than 0.
    Type: Grant
    Filed: May 10, 1994
    Date of Patent: October 17, 1995
    Assignee: Integrated Device Technology
    Inventor: David L. Campbell
  • Patent number: 5457340
    Abstract: A leadframe for use in an integrated circuit package is described. The leadframe comprises a plurality of electrically conductive leads, a die attach pad, and an electrically conductive ring or rings formed generally around the circumference of the die attach pad and between the die attach pad and leads. In one embodiment, at least one of the leads is formed integrally with each ring. The die attach pad may also be formed integrally with one or more leads. In another embodiment, the ring or rings are formed so that they are electrically isolated from the die attach pad, and the die attach pad, leads, and ring or rings are all formed in substantially the same plane. In some embodiments, the ring or rings are broken into electrically isolated sections. Each of the ring sections (and die attach pad, if appropriate) may be electrically connected to a voltage source outside the integrated circuit package (e.g., a power supply or ground).
    Type: Grant
    Filed: December 7, 1992
    Date of Patent: October 10, 1995
    Assignee: Integrated Device Technology, Inc.
    Inventors: Thomas H. Templeton, Jr., Christopher P. Wyland, David L. Campbell
  • Patent number: RE36907
    Abstract: A leadframe for use in an integrated circuit package is described. The leadframe comprises a plurality of electrically conductive leads, a die attach pad, and an electrically conductive ring or rings formed generally around the circumference of the die attach pad and between the die attach pad and leads. In one embodiment, at least one of the leads is formed integrally with each ring. The die attach pad may also be formed integrally with one or more leads. In another embodiment, the ring or rings are formed so that they are electrically isolated from the die attach pad, and the die attach pad, leads, and ring or rings are all formed in substantially the same plane. In some embodiments, the ring or rings are broken into electrically isolated sections. Each of the ring sections (and die attach pad, if appropriate) may be electrically connected to a voltage source outside the integrated circuit package (e.g., a power supply or ground).
    Type: Grant
    Filed: October 9, 1997
    Date of Patent: October 10, 2000
    Assignee: Integrated Device Technology, Inc.
    Inventors: Thomas H. Templeton, Jr., Christopher P. Wyland, David L. Campbell