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Inventor

Joel W. Spafford

Inventor
Cleveland, OH, US

Overview

1→
Patents
1990
Patent span
Physics
Primary field (CPC G)

Patents· 1 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

F15Bprimary
F15BSystems acting by means of fluids in general33%
G05BControl or regulating systems in general33%
G05DSystems for controlling or regulating non-electric variables33%
PatentTitleYear
4,920,305'Auto calibrating electro hydraulic servo driver'1990

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1990Patents assigned to BABCOCK & WILCOX CO (1)· patent assignee history
1990Based in Cleveland, OH, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
BABCOCK & WILCOX CO11990
Locations
LocationPatentsSpan
Cleveland, OH, US11990