Patents by Inventor Alan J. Pollard

Alan J. Pollard 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: 10393111
    Abstract: A pumping mechanism is disclosed. The pumping mechanism may include a barrel formed of a barrel substrate and including a first end surface, a second end surface opposite the first end surface, and a bore between the first and second end surfaces. Each of the first and second end surfaces and the bore is coated with a metal plating. The pumping mechanism may further include a plunger formed of a plunger substrate and configured to be slidably disposed in the bore in barrel, the plunger substrate having a tribological coating.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: August 27, 2019
    Assignee: Caterpillar Inc.
    Inventors: Alan Ray Stockner, Aaron M. Brown, Sridhar Thangaswamy, Glenn B. Cox, John Jay Truhan, Jr., Michael J. Pollard, John P. McDonnel
  • Patent number: 4897875
    Abstract: A telecommunications security device for use on the communication medium includes a first and a second security unit each arranged to be inserted into for example the telephone line adjacent a user device. The units are identical and therefore either can act as a central unit for example for a computer access port with the other providing one of a set of remote units. Each unit includes a separable memory module with all the modules having a memory storing identical information. The information stored includes a plurality of pairs of random signals one of each pair providing a request signal and the other the security code. The central unit on receipt of a telephone call provides a signal requesting an ID code from the remote unit and on receipt of the ID code issues from one of the pairs the security code request signal. On matching the received code with the expected code a transmission gate is opened.
    Type: Grant
    Filed: September 3, 1987
    Date of Patent: January 30, 1990
    Assignee: The Manitoba Telephone System
    Inventors: Alan J. Pollard, James R. Lemire