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Manufacturers Index - Gray-Grimes Tool Co.
Patents
This page contains information on patents issued to this manufacturer.

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Key to Links for Patent Information

USPTO = U.S. Patent Office . Images of the actual patent can be viewed on the U.S. Patent Office web site but a special TIFF viewer must be installed with your browser in order properly work. More information on how to configure your computer to view these patents can be found at TIFF image Viewers for Patent Images.
DATAMP = Directory of American Tool And Machinery Patents . A sister site to VintageMachinery.org with information on patents related to machinery and tools. A much easier user interface than the USPTO's for finding information on machinery patents.

Patent Number Date Title Name City Description
2,276,462 Mar. 17, 1942 Boring chuck Harry F. Brown Detroit, Wayne County, MI The patent specification references the inventor's earlier patent 2,177,820.
An example of this invention has been seen. It is stamped with the patent number, "DeSoto Boring Chuck", and "DeSoto Tool Co., Detroit". The DeSoto Boring Chuck was written up in various metalworking magazines in the mid-1940s. We have also seen an undated sales brochure for "Samson" boring chucks, "Pat. No. 2276462". The last page of the brochure says, "Manufactured by Gray-Grimes Tool Co. for Last Word Sales Company / 18500 Mt. Elliott / Detroit 34, Michigan / Also, distributor of Last Word Wheel Dressers / Gray-Grimes Steady-Rests".