Patents by Inventor John R. Marsella

John R. Marsella 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).

  • Test probe
    Patent number: 4504780
    Abstract: A test probe has a housing that releasably receives a plunger that is normally urged out of the housing by a spring, and which has a probe contact end normally lying external of the housing. The plunger has a compressible enlargement that normally engages a stop on the housing, but with sufficient force being exerted, may be removed from the housing.
    Type: Grant
    Filed: August 25, 1982
    Date of Patent: March 12, 1985
    Inventor: John R. Marsella