Inventor

Clive Trundle

Inventor

Silverstone, GB

Overview

11→

Patents

1987–1992

Patent span

Physics

Primary field (CPC G)

Patents· 11 as inventor

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

C07Dprimary

C07DHeterocyclic compounds17%

G03CPhotosensitive materials for photographic purposes13%

G02BOptical elements, systems or apparatus10%

G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein10%

B41MPrinting, duplicating, marking, or copying processes7%

C09DCoating compositions, e.g. paints, varnishes or lacquers7%

G03FPhotomechanical production of textured or patterned surfaces, e.g. for printing, for processing of semiconductor devices7%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests7%

B29DProducing particular articles from plastics or from substances in a plastic state3%

C09KMaterials for miscellaneous applications, not provided for elsewhere3%

PatentTitleYear

5,080,931'Doped polymer films for waveguides'1992 5,045,348'Thin film deposition process'1991 5,026,619'Reversible infra-red recording medium'1991 4,990,287'Optical devices utilizing photochromic compounds'1991 4,942,113'Contrast enhanced photolithography'1990 4,927,180'Marking of articles with photochromic compounds'1990 4,861,899'Photochromic gamma butyrolactones'1989 4,838,634'Organic optical waveguides and method of fabricating waveguide structures'1989 4,818,096'Photoreactive lenses with adamantane spiro compounds'1989 4,812,171'Irreversible photochromic markings'1989 4,685,783'Polychromic tetracyclo-spiro-adamatylidene derivatives, and polychromic lens incorporating said compounds'1987

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1987–1991Patents assigned to PLESSEY CO PLC (5)· patent assignee history

1987–1991Based in Towcester, GB· patent location history

1989Patents assigned to PLESSEY CO LTD (1)· patent assignee history

1989–1992Based in Silverstone, GB· patent location history

1990–1992Patents assigned to PLESSEY OVERSEAS (5)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
PLESSEY CO PLC	5	1987–1991
PLESSEY OVERSEAS	5	1990–1992
PLESSEY CO LTD	1	1989

Locations

Location	Patents	Span
Silverstone, GB	6	1989–1992
Towcester, GB	5	1987–1991