Screw.
Description:
Patent for a new and improved screw. This design consists in "[a] screw, the body and shank of which are of corresponding diameter throughout their length, the shank terminating in a rounded end, and the shank and body being provided with a longitudinal straight channel extending throughout their lengths, one of the terminal shoulders of the channel being removed" (lines 4-10).
Date:
June 10, 1890
Creator:
Ericson, John
Item Type:
Refine your search to only
Patent
Partner:
UNT Libraries Government Documents Department