Inventor

Edwin H. Land

Inventor

Cambridge, MA, US

Overview

46→

Patents

1976–1990

Patent span

Physics

Primary field (CPC G)

Patents· 46 as inventor

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

G03Bprimary

G03BApparatus or arrangements for taking photographs or for projecting or viewing them28%

G03CPhotosensitive materials for photographic purposes20%

H01MProcesses or means, e.g. batteries, for the direct conversion of chemical energy into electrical energy13%

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

Y10TTechnical subjects covered by former us classification7%

H05BElectric heating4%

C08FMacromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds3%

G02BOptical elements, systems or apparatus3%

G03FPhotomechanical production of textured or patterned surfaces, e.g. for printing, for processing of semiconductor devices3%

Y02EReduction of greenhouse gas [ghg] emissions, related to energy generation, transmission or distribution3%

PatentTitleYear

4,895,769'Method for preparing light polarizer'1990 4,427,748'Planar battery comprising a terminal plate having gas venting orifice covered with a layer of gas permeable material'1984 4,424,326'Copolymeric mordants'1984 4,366,235'Photosensitive element and method of preparing same'1982 4,352,874'Method for forming a photosensitive silver halide element'1982 4,329,411'Multicolor diffusion transfer products'1982 4,322,489'Copolymeric mordants and photographic products and processes utilizing same'1982 4,298,674'Color transfer film and process'1981 4,291,964'Strobe switch with camera control feature'1981 4,214,285'Sound motion picture system having concentrated audio system'1980 4,198,152'Method and apparatus for eliminating undesirable blemishes in coating of processing fluid'1980 4,194,061'Compact high voltage battery'1980 4,186,013'Silver diffusion transfer receiving layer comprising HEC and gelatin'1980 4,186,015'Silver diffusion transfer receiving layer comprising gelatin and polyvinyl alcohol'1980 4,185,903'Camera having spatially stabilized photocell'1980 4,184,745'Translucent screen'1980 4,184,756'Strobe without primary storage capacitor'1980 4,182,561'Fast charging electronic flash device'1980 4,181,778'Novel battery anode'1980 4,179,199'Combination motion picture camera and viewing apparatus'1979 4,172,640'Movie camera having supplemental exposure'1979 4,168,166'Photographic processing composition comprising borate'1979 4,165,153'Translucent screen'1979 4,161,815'Methods for making electrical cells and batteries'1979 4,125,684'Electrical cells and batteries'1978 4,124,742'Electrical cells and batteries and methods and apparatus for making the same'1978 4,119,770'Electrical cells and batteries'1978 4,099,858'Variable light transmission ophthalmic device'1978 4,096,492'Camera with detachable electronic flash unit and exposure control system therefor'1978 4,093,696'Method of making a flanged fluted self-coiling sheet'1978 4,091,400'Multiple battery camera'1978 4,072,968'Self-retracting imbibition chamber for cameras and method of making the same'1978 4,047,213'Method and apparatus for heating cassette contained film strip during processing'1977 4,046,457'Polymeric film base carrying fluoropolymer anti-reflection coating'1977 4,042,760'Flat battery'1977 4,038,077'Process comprising diffusion transfer silver image removal'1977 4,007,472'Flat battery with dry cathode strata and slurry cathode strata'1977 4,007,471'System for mounting photographic accessories on a camera'1977 4,007,469'Photographic apparatus with plurality of selectively determinable operational modes'1977 4,007,470'Battery operated camera having a handle thereon formed in part by an external battery'1977 3,996,050'Whitening agents in color diffusion transfer film units'1976 3,994,008'Camera accessory mount'1976 3,990,898'In-process color balance adjustment of photographic film using filter dyes'1976 3,990,895'Silver halide, color screen elements and their use in forming negative color images and diffusion transfer positive silver images'1976 3,976,486'Diffusion transfer color products and processes with substituted halide silver halide emulsions'1976 3,958,261'Reflex camera and viewing device and attachment therefor'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–1990Patents assigned to POLAROID CORP (46)· patent assignee history

1976–1990Based in Cambridge, MA, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
POLAROID CORP	46	1976–1990

Locations

Location	Patents	Span
Cambridge, Massachusetts, US	46	1976–1990