Individual holder
FRENCH HARTLEY A
2 granted patents·49 citations·filing 1980–1984
Individually held — no corporate assignee on record.
Top patents by PatentIndex Score
2 records- 0162US4714888AApparatus for observing the passage of a pig in a pipelineFRENCH HARTLEY A·Filed 1984·Granted Dec 22, 1987·23 cites·18 claims
- 0262US4430613APipeline inspection and maintenance method including moving a magnetic field responsive device along the route of the pipelineFRENCH HARTLEY A·Filed 1980·Granted Feb 7, 1984·26 cites·8 claims
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