Patents by Inventor Mark Stehrenberger

Mark Stehrenberger 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).

  • Safety hypodermic needle guard
    Patent number: 5269761
    Abstract: A safety needle system has a sheath that is capable of reciprocally sliding over the exterior of a syringe to alternately cover and uncover the needle portion of the syringe. The sheath is locked over the needle by means of a locking slot and coiled spring. A dog on the needle hub engages the locking slot and is held in position in the locking slot by the coiled spring. The sheath is reciprocally slidable on the exterior of the needle of the syringe by twisting the sheath to disengage the dog from the slot and moves the dog into a guide slot so that the sheath can be moved manually to expose the needle.
    Type: Grant
    Filed: August 17, 1992
    Date of Patent: December 14, 1993
    Inventors: Mark Stehrenberger, Gordon A. Herrald