Home| FAQ Search:Advanced|Person|Company| Type|Class Login
Quick search:
Patent number:
Patent Date:
first    back  next  last
US Patent: 189,889
Expanding Screw Tap
Patentee:
John Brown Douglas (exact or similar names) - Philadelphia, PA

USPTO Classifications:
408/154

Tool Categories:
metalworking tools : taps and dies

Assignees:
Morris, Tasker & Co., Ltd. - Philadelphia, PA

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Mar. 03, 1877
Granted: Apr. 24, 1877

Patent Pictures:
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Joel Havens

Copyright © 2002-2024 - DATAMP