Patents by Inventor William P. Sinclair

William P. Sinclair 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).

  • Cartridge magazine
    Patent number: 5127178
    Abstract: There is disclosed a magazine for holding cartridges such as shot gun cartridges, the magazine having, in a preferred embodiment, two channels (6,7) which are separated by a partition (8) and each of which can hold two staggered columns of cartridges (9). The partition (8) has a widened portion (10) that causes each staggered column of cartridges (9) to form a single column thereof, so that pairs of cartridges can be removed, to be immediately replaced, under the effect of gravity, by a further pair thereof.
    Type: Grant
    Filed: May 2, 1990
    Date of Patent: July 7, 1992
    Inventor: William P. Sinclair