Patents by Inventor Robert F. Bischoff, Jr.

Robert F. Bischoff, Jr. 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).

  • Latch bolt mechanism
    Patent number: 4124238
    Abstract: This invention relates to a door lock, and particularly to a lock whose latch bolt extends beyond what is considered normal extension for a door lock. This invented lock not only fastens the door closed, but it also has a second function; namely, to act as a dead lock.
    Type: Grant
    Filed: November 3, 1975
    Date of Patent: November 7, 1978
    Inventor: Robert F. Bischoff, Jr.
  • Turning mechanism
    Patent number: 4118055
    Abstract: This invention relates to a door lock, and particularly to the turning mechanism which activates movement of the latch bolt mechanism of the door lock.
    Type: Grant
    Filed: November 3, 1975
    Date of Patent: October 3, 1978
    Inventor: Robert F. Bischoff, Jr.
  • Mechanism for holding fasteners
    Patent number: 4063580
    Abstract: A mechanism which holds a fastener's head in a non-slipping position and in which the shaft of the said mechanism is the driving force which rotates the said fastener in either a counterclockwise or a clockwise direction.In the field of mechanics, when screwing a screw into wood or other types of material, the screw driver being used for the said screwing has a tendency to slip from the screw-head of the screw being screwed, either slipping to one side or to the other. It then usually becomes the chore of the workman governing the driving or screwing to keep control over the holding of the said screw driver in proper contact with the head of the screw, and at the same time, the said workman must keep control of the upright position of the said screw with the material into which the screw is to be inserted.
    Type: Grant
    Filed: February 10, 1976
    Date of Patent: December 20, 1977
    Inventor: Robert F. Bischoff, Jr.
  • Testing of automobile headlights
    Patent number: 4017189
    Abstract: A machine which surveys the focussing of motor vehicle headlights, said surveying accomplished by the invented machine using an existing light-sensitive element and in correlation with a radar detecting system.
    Type: Grant
    Filed: May 20, 1975
    Date of Patent: April 12, 1977
    Inventor: Robert F. Bischoff, Jr.
  • Process for developing surfaces
    Patent number: 3977803
    Abstract: A process for developing surfaces to determined elevations upon sound surfaces, whether or not these said sound surfaces are level or regular, said development to be done by the use of pre-set points and pre-set screeds, used either alone or in conjunction with one another, formed upon the said sound surfaces, which pre-set points and pre-set screeds become part of the new surfaces being developed.
    Type: Grant
    Filed: December 11, 1974
    Date of Patent: August 31, 1976
    Inventor: Robert F. Bischoff, Jr.
  • Process of forming moldable polymers
    Patent number: 3974252
    Abstract: A method or process of forming an arch or curve or other geometric figure or a memory retention of said arch, curve, or other geometric figure, in either extruded moldable polymer or moldable polymer, either filled or unfilled.
    Type: Grant
    Filed: July 5, 1974
    Date of Patent: August 10, 1976
    Inventor: Robert F. Bischoff, Jr.