Patents by Inventor Jean Arnold Fischer

Jean Arnold Fischer 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).

  • Door lock
    Patent number: 4040652
    Abstract: A door lock having a press button operable to retract the door bolt from its engaged to its released position, and a separate operating means to positively lock the bolt whereby the press button is raised or lowered from its normal position so as to serve as a visual signal indicating whether the bolt is locked or is free for normal retraction.
    Type: Grant
    Filed: February 11, 1974
    Date of Patent: August 9, 1977
    Assignee: Daempa A/S
    Inventors: Soren Christian Schoubye Arfelt, Ib Christian Clausen, Johannes Jensen, Knud Hansen Fynbo, Jean Arnold Fischer