Patents by Inventor David B. Ward
David B. Ward 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).
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Patent number: 11919313Abstract: A print device may include a refill interface, a processor, and a computer readable medium. The refill interface may have an electrical interface for transmission and reception of signals between the print device and a refill container. And the computer-readable medium may have instructions stored thereon that when executed by the processor are to cause the processor to fetch signals, via the electrical interface of the refill interface, from the refill container indicative of a licensed print functionality of the print device. The instructions may also be to enable the licensed print functionality on the print device responsive to the fetched signals and to maintain the licensed print functionality enabled subsequent to detachment of the refill container.Type: GrantFiled: December 4, 2018Date of Patent: March 5, 2024Assignee: Hewlett-Packard Development Company, L.P.Inventors: Jefferson P. Ward, David B. Novak, Erik Anderson
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Publication number: 20240066518Abstract: Broad volumetric range pipettes with multi-tiered pipette tip holder and ejection assemblies and methods of using such pipettes are disclosed herein. These pipettes typically include a concentric cylinder arrangement with each outer cylinder configured for contacting and dislodging a pipette tip attached to the tip holder portion of the immediately adjacent inner cylinder. In this manner, different sized pipette tips can be used on a single device. In addition, a locking mechanism is described for locking the large tip holder into a downward position to minimize the extension of the small tip holder and thereby enabling attachment of large, filtered pipette tips and reducing/eliminating the risk that the liquid being transferred will contaminate the pipetting device.Type: ApplicationFiled: August 29, 2023Publication date: February 29, 2024Applicant: DeNovix Inc.Inventors: Benayah Ben-Avraham, Daniel Schieffer, David L. Ash, Fernando Frederick Kielhorn, David B. Ward
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Patent number: 11679383Abstract: Multivolume liquid pipettes with nested plunger and vacuum chamber configurations and methods of using such pipettes are disclosed herein. These pipettes typically include a body and a fluid displacement assembly with a small plunger element slideably received within a larger plunger element, each movable within a vacuum chamber for the precise and accurate control of the displacement of fluid, such as air. In turn, this allows for a single device to aspirate and dispense a broad range of liquids in a dynamic, accurate, and precise manner. In addition, the devices disclosed herein may also include a multi-tiered spring-loaded ejection mechanism to allow the user to use and eject pipette tips of different sizes.Type: GrantFiled: July 27, 2022Date of Patent: June 20, 2023Assignee: DeNovix, IncInventors: Daniel A. Schieffer, David L. Ash, David B. Ward
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Patent number: 11660592Abstract: Multivolume liquid pipettes with nested plunger and vacuum chamber configurations and methods of using such pipettes are disclosed herein. These pipettes typically include a body and a fluid displacement assembly with a small plunger element slideably received within a larger plunger element, each movable within a vacuum chamber for the precise and accurate control of the displacement of fluid, such as air. In turn, this allows for a single device to aspirate and dispense a broad range of liquids in a dynamic, accurate, and precise manner. In addition, the devices disclosed herein may also include a multi-tiered spring-loaded ejection mechanism to allow the user to use and eject pipette tips of different sizes.Type: GrantFiled: February 12, 2021Date of Patent: May 30, 2023Assignee: DeNovix, Inc.Inventors: Daniel A. Schieffer, David L. Ash, David B. Ward
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Publication number: 20220362759Abstract: Multivolume liquid pipettes with nested plunger and vacuum chamber configurations and methods of using such pipettes are disclosed herein. These pipettes typically include a body and a fluid displacement assembly with a small plunger element slideably received within a larger plunger element, each movable within a vacuum chamber for the precise and accurate control of the displacement of fluid, such as air. In turn, this allows for a single device to aspirate and dispense a broad range of liquids in a dynamic, accurate, and precise manner. In addition, the devices disclosed herein may also include a multi-tiered spring-loaded ejection mechanism to allow the user to use and eject pipette tips of different sizes.Type: ApplicationFiled: July 27, 2022Publication date: November 17, 2022Applicant: DENOVIX, INC.Inventors: Daniel A. Schieffer, David L. Ash, David B. Ward
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Publication number: 20210252496Abstract: Multivolume liquid pipettes with nested plunger and vacuum chamber configurations and methods of using such pipettes are disclosed herein. These pipettes typically include a body and a fluid displacement assembly with a small plunger element slideably received within a larger plunger element, each movable within a vacuum chamber for the precise and accurate control of the displacement of fluid, such as air. In turn, this allows for a single device to aspirate and dispense a broad range of liquids in a dynamic, accurate, and precise manner. In addition, the devices disclosed herein may also include a multi-tiered spring-loaded ejection mechanism to allow the user to use and eject pipette tips of different sizes.Type: ApplicationFiled: February 12, 2021Publication date: August 19, 2021Applicant: DENOVIX, INC.Inventors: Daniel A. SCHIEFFER, David L. Ash, David B. Ward
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Publication number: 20160290866Abstract: An apparatus and method for measuring fluorescence of a sample is described. An apparatus includes three or more fluorescence channels passing through a sample site. The three or more fluorescence channels allow for exposing a sample at the sample site to light from three or more light sources, which results in fluorescence measurements based on emissions from the sample in response to the three or more light sources.Type: ApplicationFiled: March 30, 2016Publication date: October 6, 2016Inventors: Fernando F. Kielhorn, David B. Ward, David L. Ash
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Patent number: 9442009Abstract: An improved apparatus and method for making optical measurements of a sample is described. In one embodiment, the apparatus is a microvolume sampling mechanism comprised of two opposing optical measurement surfaces. A sample is held by surface tension between the two opposing optical measurement surfaces. Light is transmitted through the sample and received by optical fibers, which measure the absorbance of the sample. This absorbance can be used to determine the concentration of the sample.Type: GrantFiled: February 14, 2014Date of Patent: September 13, 2016Assignee: DeNovix, Inc.Inventors: Fernando F. Kielhorn, David B. Ward
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Publication number: 20150233760Abstract: An improved apparatus and method for making optical measurements of a sample is described. In one embodiment, the apparatus is a microvolume sampling mechanism comprised of two opposing optical measurement surfaces. A sample is held by surface tension between the two opposing optical measurement surfaces. Light is transmitted through the sample and received by optical fibers, which measure the absorbance of the sample. This absorbance can be used to determine the concentration of the sample.Type: ApplicationFiled: February 14, 2014Publication date: August 20, 2015Applicant: DeNovix Inc.Inventors: Fernando F. KIELHORN, David B. Ward
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Patent number: 4399624Abstract: A garment pressing machine wherein a pivotable link is disposed in spaced relationship to the machine arm carrying the machine pressing head and an actuator is arranged between the link and arm to provide the necessary pressure for pressing. Initial pivoting of the arm and link with the actuator therebetween occurs before the application of force by the actuator. A latching mechanism prevents reverse pivoting of the link during force application and the desired pressing pressure is achieved. The latching mechanism is further arranged so as not to latch unless initial pivoting of the arm has been completed.Type: GrantFiled: June 4, 1981Date of Patent: August 23, 1983Assignee: Rheem Textile Systems, Inc.Inventor: David B. Ward