FR39408E - Improvements to projection devices - Google Patents

Improvements to projection devices

Info

Publication number
FR39408E
FR39408E FR39408DA FR39408E FR 39408 E FR39408 E FR 39408E FR 39408D A FR39408D A FR 39408DA FR 39408 E FR39408 E FR 39408E
Authority
FR
France
Prior art keywords
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)
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.)
TRANS-LUX DAYLIGHT PICTURE SCREEN Corp
Trans Lux Daylight Picture Screen Corp
Original Assignee
TRANS-LUX DAYLIGHT PICTURE SCREEN Corp
Trans Lux Daylight Picture Screen Corp
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 TRANS-LUX DAYLIGHT PICTURE SCREEN Corp, Trans Lux Daylight Picture Screen Corp filed Critical TRANS-LUX DAYLIGHT PICTURE SCREEN Corp
Application granted granted Critical
Publication of FR39408E publication Critical patent/FR39408E/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
FR39408D 1930-11-14 1930-11-14 Improvements to projection devices Expired FR39408E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR39408T 1930-11-14

Publications (1)

Publication Number Publication Date
FR39408E true FR39408E (en) 1931-10-19

Family

ID=8675792

Family Applications (1)

Application Number Title Priority Date Filing Date
FR39408D Expired FR39408E (en) 1930-11-14 1930-11-14 Improvements to projection devices

Country Status (1)

Country Link
FR (1) FR39408E (en)

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