Patents by Inventor Marvin E. Plummer

Marvin E. Plummer 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).

  • Patent number: 4338909
    Abstract: Unique bow structure formed of three lengths of light weight tubular material and inclusive of a primary beam member, having removably but hingedly secured thereto, two identical lever arms having end extremities connected to the adjacent end extremity of the beam member by a spring-like member, said end extremities of lever arms being spanned by a bow string, maintained in tension in the static position and an even greater tension when the bow string is pulled back together with an associated arrow at the mid region of said bow string.
    Type: Grant
    Filed: May 7, 1980
    Date of Patent: July 13, 1982
    Inventor: Marvin E. Plummer