Patents by Inventor Calvin Heisinger

Calvin Heisinger 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).

  • Device to assist disabled persons
    Patent number: D365314
    Type: Grant
    Filed: October 17, 1994
    Date of Patent: December 19, 1995
    Assignee: Bryant Life-Care Products, Inc.
    Inventor: Calvin Heisinger