Patents by Inventor David W. Ackerman

David W. Ackerman 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).

  • Patent number: 10286411
    Abstract: An electrostatic spray dryer for drying liquid into powder including an elongated body defining a drying chamber, a spray nozzle assembly at one end of the drying chamber and a filter element housing and powder collection chamber at an opposite end. A non-structural non-metallic liner is disposed within the elongated body in spaced relation to an inner wall surface for defining an internal drying zone. The liner is releasably supported within the body for enabling selective removal and replacement following a particular usage. The illustrated elongated body has a modular construction comprising a plurality of modules, with at least one being selectively removable and replacement for altering the length of the drying chamber for a particular spray application. The liner also is replaceable with a liner of a length corresponding to the altered length of the drying chamber or with a different diameter for a particular usage.
    Type: Grant
    Filed: November 3, 2016
    Date of Patent: May 14, 2019
    Assignee: Spraying Systems Co.
    Inventors: Thomas E. Ackerman, Christopher W. Barnes, Adam C. Bright, David C. Huffman, Scott J. Kocsis, Kristopher E. Roskos, Glenn R. St. Peter, Brian K. Smith, Joseph P. Szczap, Michel R. Thénin, Chin Ping Su, Robert M. Sobel
  • Patent number: 5915210
    Abstract: A two-way communication system for communication betweeen a system network and a mobile unit. The system network includes a plurality of base transmitters and base receivers include in the network. The base transmitters are divided into zonal assignments and broadcast in simulcast using multi-carrier modulation techniques. The system network controls the base transmitters to broadcast in suimulcast during both systemwide and zone boundaries to maximize information throughout. The preferred mobile unit inlcudes a noise detector circuit to prevent unwanted transmissions. The system network further provides an adaptive registration feature for mobile units which controls the registration operation by the mobile units to maximize information throughout.
    Type: Grant
    Filed: July 24, 1997
    Date of Patent: June 22, 1999
    Assignee: Destineer Corporation
    Inventors: Dennis Wayne Cameron, Walter Charles Roehr, Jr., Jai P. Bhagat, Masood Garahi, William D. Hays, David W. Ackerman
  • Patent number: 5754946
    Abstract: A two-way communication system for communication between a system network and a mobile unit. The system network includes a plurality of base transmitters and base receivers included in the network. The base transmitters are divided into zonal assignments and broadcast in simulcast using multi-carrier modulation techniques. The system network controls the base transmitters to broadcast in simulcast during both systemwide and zonal time intervals. The system network dynamically alters zone boundaries to maximize information throughput. The system also uses a mobile unit which receives messages from the network and transmits messages to the network. The mobile unit includes a switch that allows a user to request the network to retransmit a received message that contains errors.
    Type: Grant
    Filed: September 21, 1993
    Date of Patent: May 19, 1998
    Assignee: Mobile Telecommunication Technologies
    Inventors: Dennis Wayne Cameron, Walter Charles Roehr, Rade Petrovic, Jai P. Bhagat, Masood Garahi, William D. Hays, David W. Ackerman
  • Patent number: 5634198
    Abstract: A two-way communication system for communication between a system network and a mobile unit. The system network includes a plurality of base transmitters and base receivers included in the network. The base transmitters are divided into zonal assignments and broadcast in simulcast using multi-carrier modulation techniques. The system network controls the base transmitters to broadcast in simulcast during both systemwide and zonal time intervals. The system network dynamically alters zone boundaries to maximize information throughput. The preferred mobile unit includes a noise detector circuit to prevent unwanted transmissions. The system network further provides an adaptive registration feature for mobile units which controls the registration operations by the mobile units to maximize information throughput.
    Type: Grant
    Filed: February 13, 1995
    Date of Patent: May 27, 1997
    Assignee: Destineer Corporation
    Inventors: Dennis W. Cameron, Walter C. Roehr, Jr., Jai P. Bhagat, Masood Garahi, William D. Hays, David W. Ackerman
  • Patent number: 5590403
    Abstract: A two-way communication system for communication between a system network and a mobile unit. The system network includes a plurality of base transmitters and base receivers included in the network. The base transmitters are divided into zonal assignments and broadcast in simulcast using multi-carrier modulation techniques. The system network controls the base transmitters to broadcast in simulcast during both systemwide and zonal time intervals. The system network dynamically alters zone boundaries to maximize information throughput. The preferred mobile unit includes a noise detector circuit to prevent unwanted transmissions. The system network further provides an adaptive registration feature for mobile units which controls the registration operations by the mobile units to maximize information throughput.
    Type: Grant
    Filed: November 12, 1992
    Date of Patent: December 31, 1996
    Assignee: Destineer Corporation
    Inventors: Dennis W. Cameron, Walter C. Roehr, Jr., Rade Petrovic, Jai P. Bhagat, Masood Garahi, William D. Hays, David W. Ackerman
  • Patent number: 5414750
    Abstract: A system for establishing a communication link between a caller and a mobile communication device that includes a mobile telephone and a paging device capable of receiving information transmitted from a paging network. In addition to the mobile communication device, the system includes a telephone network, a first mobile switching center, a conference bridge, a paging network, and a second mobile switching center. The first mobile switching center receives a telephone call transmitted over the telephone network using an identification number of the mobile telephone. If the mobile communication device is not located in the area covered by the mobile switching center, the mobile switching center forwards the received telephone call to a conference bridge using a bridge number assigned to the mobile communication device. The conference bridge receives the forwarded telephone call and transmits an identification number of the paging device in the mobile communication device to the paging network.
    Type: Grant
    Filed: June 9, 1993
    Date of Patent: May 9, 1995
    Assignee: Mobile Telecommunication Technologies
    Inventors: Jai P. Bhagat, David W. Ackerman, Ernest A. Oswalt, William D. Hays