Home| FAQ Search:Advanced|Person|Company| Type|Class Login
Quick search:
Patent number:
Patent Date:
first  previous  back  next  last
US Patent: 204,028
Improvement in screw-cutting dies
Patentees:
John J. Grant (exact or similar names) - Hartford, CT
Nelson Sawyer (exact or similar names) - Hartford, CT
Frederick N. Gardner (exact or similar names) - Hartford, CT

USPTO Classifications:
408/162

Tool Categories:
industrial tools : taps and dies
metalworking tools : taps and dies

Assignees:
Pratt & Whitney Co. - Hartford, CT

Manufacturer:
Pratt, Whitney & Co. - Hartford, CT

Witnesses:
Theodore G. Ellis
Wilmot Horton

Patent Dates:
Applied: Apr. 13, 1878
Granted: May 21, 1878

Patent Pictures:
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Joel Havens
"Vintage Machinery" entry for Pratt & Whitney Co.

Copyright © 2002-2024 - DATAMP