Patents by Inventor Thomas A. Milheiser

Thomas A. Milheiser 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).

  • Identification system
    Patent number: 5166676
    Abstract: A passive integrated transponder (PIT) is attached to or embedded in an item to be identified. It is excited via an inductive coupling from an interrogator. The PIT responds to the interrogator via the inductive coupling with a signal constituting a stream of data unique to the identified item. The signal is in the form of two different frequencies, a shift from one frequency to the second during a bit cell representing a data "one", and a shift from the second frequency to the first frequency representing a data "zero". The responsive signal is then detected and processed for utilization in a data storage or display device.
    Type: Grant
    Filed: February 16, 1990
    Date of Patent: November 24, 1992
    Assignee: Destron/IDI, Inc.
    Inventor: Thomas A. Milheiser
  • Identification system
    Patent number: 5041826
    Abstract: A passive integrated transponder (PIT) is attached to or embedded in an item to be identified. It is excited via an inductive coupling from an interrogator. The PIT responds to the interrogator via the inductive coupling with a signal constituting a stream of data unique to the identified item. The signal is in the form of two different frequencies, a shift from one frequency to the second during a bit cell representing a data "one", and a shift from the second frequency to the first frequency representing a data "zero". The responsive signal is then detected and processed for utilization in a data storage or display device.
    Type: Grant
    Filed: February 16, 1990
    Date of Patent: August 20, 1991
    Assignee: Destron/IDI Inc.
    Inventor: Thomas A. Milheiser
  • Identification system
    Patent number: 4730188
    Abstract: A passive integrated transponder (PIT) is attached to or embedded in an item to be identified. It is excited via an inductive coupling from an interrogator. The PIT responds to the interrogator via the inductive coupling with a signal constituting a stream of data unique to the identified item. The signal is in the form of two different frequencies, a shift from one frequency to the second during a bit cell representing a data "one", and a shift from the second frequency to the first frequency representing a data "zero". The responsive signal is then detected and processed for utilization in a data storage or display device.
    Type: Grant
    Filed: December 30, 1985
    Date of Patent: March 8, 1988
    Assignee: Identification Devices, Inc.
    Inventor: Thomas A. Milheiser