Home
|
FAQ
Search:
Advanced
|
Person
|
Company
|
Type
|
Class
Login
Quick search:
Patent number:
Patent Date:
US Patent: 1,539,978
Chronograph
Patentee:
Guysbert B. Vroom (
exact
or
similar
names) - Washington, DC
USPTO Classifications:
346/4
,
346/49
,
73/114.18
Tool Categories:
propulsion and energy
:
steam apparatus
:
steam engine indicators
Assignees:
None
Manufacturer:
Not known to have been produced
Witnesses:
Unknown
Patent Dates:
Applied:
Jun. 06, 1924
Granted:
Jun. 02, 1925
Patent Pictures:
USPTO
(New site tip)
Google Patents
Report data errors or omissions to steward Joel Havens
The Story of the Steam Engine Indicator
Copyright © 2002-2024 - DATAMP