Patents by Inventor Casimer Gotfryd

Casimer Gotfryd 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).

  • Telephone line switch apparatus
    Patent number: 5033083
    Abstract: A telephone line switch actuating mechanism includes two identical parts, each having a portion which makes up a plunger, while the remaining portion is pivotally mounted for enabling the two parts to be assembled in an opposing relationship to each other into a mechanism such that depression of either plunger activates the other plunger and the telephone line switch.
    Type: Grant
    Filed: September 29, 1989
    Date of Patent: July 16, 1991
    Assignee: AT&T Bell Laboratories
    Inventors: Casimer Gotfryd, James F. Oneby
  • Quiet key switch
    Patent number: 4859820
    Abstract: A key switch utilizing a buckling compression spring to move a switch actuator mechanism includes a cylindrical core of resilient material located within an opening formed by the coils of the compression spring to attenuate the acoustical energy generated by the buckling and unbuckling action of the spring.
    Type: Grant
    Filed: March 31, 1988
    Date of Patent: August 22, 1989
    Assignees: American Telephone and Telegraph Company, AT&T Information Systems Inc.
    Inventors: Casimer Gotfryd, Stephen L. Kay, Hartland P. Klotz, Robert M. Wentzel
  • Stand-alone keyboard
    Patent number: D278239
    Type: Grant
    Filed: October 8, 1982
    Date of Patent: April 2, 1985
    Assignee: Teletype Corporation
    Inventors: Christian Felix, Donald M. Genaro, Casimer Gotfryd