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Inventor

David M. Warren

Inventor
Woodmere, NY, US

Overview

4→
Patents
1982–1989
Patent span
Physics
Primary field (CPC G)

Patents· 4 as inventor

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

G06Kprimary
G06KGraphical data reading29%
G07BTicket-issuing apparatus29%
C23CCoating metallic material14%
H01FMagnets14%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests14%
PatentTitleYear
4,829,568'System for the printing and reading of encrypted messages'19894,793,908'Multiple ion source method and apparatus for fabricating multilayer optical films'19884,641,346'System for the printing and reading of encrypted messages'19874,317,700'Method of fabrication of planar bubble domain device structures'1982

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1982–1988Patents assigned to ROCKWELL INTERNATIONAL CORP (2)· patent assignee history
1982Based in Fullerton, CA, US· patent location history
1987–1989Patents assigned to PITNEY BOWES INC (2)· patent assignee history
1987–1989Based in Woodmere, NY, US· patent location history
1988Based in Chino Hills, CA, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
PITNEY BOWES INC21987–1989
ROCKWELL INTERNATIONAL CORP21982–1988
Locations
LocationPatentsSpan
Woodmere, New York, US21987–1989
Chino Hills, California, US11988
Fullerton, California, US11982