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Inventor

William H. Armstrong

Inventor
Troy, MI, US

Overview

4→
Patents
1977–1989
Patent span
Human necessities
Primary field (CPC A)

Patents· 4 as inventor

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

A47Cprimary
A47CChairs25%
A47LDomestic washing or cleaning25%
B66CCranes25%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests25%
PatentTitleYear
4,825,502'Device for visual inspection of fluid flow'1989D0284025'Roof-top air conditioner cabinet for a vehicle'19864,518,200'Seat pad with adjustable lumbar support'19854,026,593'Quick find grabber-mine recovery'1977

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1977Patents assigned to US NAVY (1)· patent assignee history
1977Based in San Diego, CA, US· patent location history
1985Patents assigned to ARMSTRONG WILLIAM H (1)· patent assignee history
1985Based in Grand Rapids, MI, US· patent location history
1986Patents assigned to THE DUO THERM CORP (1)· patent assignee history
1986–1989Based in Troy, MI, US· patent location history
1989Patents assigned to REXAIR INC (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
ARMSTRONG WILLIAM Hself11985
REXAIR INC11989
THE DUO THERM CORP11986
US NAVY11977
Locations
LocationPatentsSpan
Troy, MI, US21986–1989
Grand Rapids, MI, US11985
San Diego, California, US11977