Home| FAQ Search:Advanced|Person|Company| Type|Class Login
Quick search:
Patent number:
Patent Date:
first  previous  back  next  last
US Patent: 669,251
Saw-sharpening machine
Patentees:
Henry P. Schofield (exact or similar names) - Chicago, IL
Lars Larsen Filstrup (exact or similar names) - Chicago, IL

USPTO Classifications:
474/4, 74/370, 74/380, 76/37

Tool Categories:
metalworking machines : grinders : sharpening machines : saw sharpening machines

Assignees:
None

Manufacturer:
Covel Mfg. Co. - Chicago, IL

Witnesses:
Albert D. Bacci
D. W. Lee

Patent Dates:
Applied: Dec. 03, 1900
Granted: Mar. 05, 1901

Patent Pictures:
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Jeff Joslin
Vintage Machinery entry for Covel Mfg. Co.
Description:
In 1905 the Seventh Circuit Court of Appeals found patent 654,843, 654,844, 654,845, and 669,251, "void for lack of patentable invention in view of the prior art, in which the same devices were found in use in saw-swaging machines."

Copyright © 2002-2024 - DATAMP