FR502622A - Improvements in photographic printing processes for projection films and other applications - Google Patents

Improvements in photographic printing processes for projection films and other applications

Info

Publication number
FR502622A
FR502622A FR502622A FR502622DA FR502622A FR 502622 A FR502622 A FR 502622A FR 502622 A FR502622 A FR 502622A FR 502622D A FR502622D A FR 502622DA FR 502622 A FR502622 A FR 502622A
Authority
FR
France
Prior art keywords
applications
printing processes
photographic printing
projection films
films
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
FR502622A
Other languages
French (fr)
Inventor
William Van Dorn Kelley
Joseph Mason
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 by Individual filed Critical Individual
Application granted granted Critical
Publication of FR502622A publication Critical patent/FR502622A/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
    • G03B27/00—Photographic printing apparatus
    • G03B27/72—Controlling or varying light intensity, spectral composition, or exposure time in photographic printing apparatus

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
FR502622A 1917-07-26 1919-08-14 Improvements in photographic printing processes for projection films and other applications Expired FR502622A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US502622XA 1917-07-26 1917-07-26

Publications (1)

Publication Number Publication Date
FR502622A true FR502622A (en) 1920-05-21

Family

ID=21964264

Family Applications (1)

Application Number Title Priority Date Filing Date
FR502622A Expired FR502622A (en) 1917-07-26 1919-08-14 Improvements in photographic printing processes for projection films and other applications

Country Status (1)

Country Link
FR (1) FR502622A (en)

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