FR40464E - Improvement in projection devices - Google Patents

Improvement in projection devices

Info

Publication number
FR40464E
FR40464E FR40464DA FR40464E FR 40464 E FR40464 E FR 40464E FR 40464D A FR40464D A FR 40464DA FR 40464 E FR40464 E FR 40464E
Authority
FR
France
Prior art keywords
improvement
projection devices
projection
devices
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Other languages
French (fr)
Inventor
Henri-Francois-Etien Dusseri
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Application granted granted Critical
Publication of FR40464E publication Critical patent/FR40464E/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR40464D 1931-06-27 1931-06-27 Improvement in projection devices Expired FR40464E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR40464T 1931-06-27

Publications (1)

Publication Number Publication Date
FR40464E true FR40464E (en) 1932-07-01

Family

ID=8676738

Family Applications (1)

Application Number Title Priority Date Filing Date
FR40464D Expired FR40464E (en) 1931-06-27 1931-06-27 Improvement in projection devices

Country Status (1)

Country Link
FR (1) FR40464E (en)

Similar Documents

Publication Publication Date Title
FR735194A (en) Improvements to cinematographic projection devices
FR736754A (en) lenticular screen
FR40464E (en) Improvement in projection devices
FR714816A (en) Improvement in projection devices
FR726386A (en) Elastic Gears Improvement
FR736122A (en) Improvements to t devices. s. f.
FR740234A (en) Tilting devices
FR735067A (en) Projector refinements
FR717557A (en) Improvement in lifting devices
FR751840A (en) projection screen
FR731091A (en) Improvements to projection devices
FR738393A (en) Improvement in photographic straightening devices
FR711571A (en) Improvements to projection devices
FR39408E (en) Improvements to projection devices
FR758073A (en) Improvement in filtration devices
FR728258A (en) Improvements to anti-glare devices
FR733078A (en) Improvements to chemographic devices
FR735042A (en) Improvements to cinematographic projection devices
FR729167A (en) Improvements to cinematographic devices
FR726029A (en) Improvements to cinematographic devices
FR736353A (en) Improvements to cinematographic devices
FR710604A (en) Improvements to cryptographic devices
CA314210A (en) Projection device
FR735972A (en) Improvement in starting mechanisms
FR728140A (en) Respiratory System Improvements