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Inventor

David E. Birt

Inventor
Hanwell, GB

Overview

5→
Patents
1980–2002
Patent span
Performing operations
Primary field (CPC B)

Patents· 5 as inventor

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

B29Cprimary
B29CShaping or joining of plastics17%
B29DProducing particular articles from plastics or from substances in a plastic state17%
B30BPresses in general8%
C08LCompositions of macromolecular compounds8%
C09JAdhesives8%
C25DProcesses for the electrolytic or electrophoretic production of coatings8%
E04BGeneral building constructions8%
G11BInformation storage based on relative movement between record carrier and transducer8%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests8%
Y10TTechnical subjects covered by former us classification8%
PatentTitleYear
6,497,078'Adhesive composition for chemically inert substrate'20024,364,816'Record matrix preparation'19824,288,481'Foil video discs'19814,277,071'Disc records having surface markings'19814,231,730'Moulding video discs'1980

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1980–1982Patents assigned to EMI LTD (4)· patent assignee history
1980–1981Based in London, GB· patent location history
1981–1982Based in Hanwell, GB· patent location history
2002Patents assigned to FORTY TEN L L C (1)· patent assignee history
2002Based in Houston, TX, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
EMI LTD41980–1982
FORTY TEN L L C12002
Locations
LocationPatentsSpan
Hanwell, GB21981–1982
London, GB21980–1981
Houston, Texas, US12002