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Patent number:
Patent Date:
US Patent: 549,449
Apparatus for indicating difference of phase
Patentee:
Michael von Dolivo-Dobrowolsky (
exact
or
similar
names) - Berlin, Germany
USPTO Classifications:
307/102
,
307/84
,
322/20
,
322/80
,
324/90
Tool Categories:
electrical devices
Assignees:
None
Manufacturer:
Not known to have been produced
Witnesses:
Karl Wilkens
Anton Weber
Patent Dates:
Applied:
Apr. 20, 1895
Granted:
Nov. 05, 1895
Patent Pictures:
USPTO
(New site tip)
Google Patents
Report data errors or omissions to steward Jeff Joslin
Description:
US equivalent of British patent
GB-189,223,113
and German patent
DE-69,159
.
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