BE736885A - - Google Patents

Info

Publication number: BE736885A
Authority: BE; Belgium

Application number

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.)

1968-08-21

Filing date

1969-07-31

Publication date

1969-12-31

1969-07-31 Application filed filed Critical

1969-12-31 Publication of BE736885A publication Critical patent/BE736885A/xx

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
- G03B21/54—Accessories
- G03B21/56—Projection screens
- G03B21/58—Projection screens collapsible, e.g. foldable; of variable area

Landscapes

Physics & Mathematics (AREA)
General Physics & Mathematics (AREA)

BE736885D 1968-08-21 1969-07-31 BE736885A (de)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
DE1797141		1968-08-21

Publications (1)

Publication Number	Publication Date
BE736885A true BE736885A (de)	1969-12-31

Family

ID=5708530

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
BE736885D BE736885A (de)	1968-08-21	1969-07-31

Country Status (4)

Country	Link
BE (1)	BE736885A (de)
CH (1)	CH495565A (de)
FR (1)	FR2016030A1 (de)
NL (1)	NL6912699A (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE9111610U1 (de) *	1991-07-08	1991-11-07	Mechanische Weberei GmbH & Co., 4792 Bad Lippspringe	Gehäusekasten für aufrollbare Lichtbildwand

1969
- 1969-07-11 CH CH1062369A patent/CH495565A/de not_active IP Right Cessation
- 1969-07-31 BE BE736885D patent/BE736885A/xx unknown
- 1969-08-01 FR FR6926445A patent/FR2016030A1/fr not_active Withdrawn
- 1969-08-20 NL NL6912699A patent/NL6912699A/xx unknown

Also Published As

Publication number	Publication date
NL6912699A (de)	1970-02-24
CH495565A (de)	1970-08-31
FR2016030A1 (de)	1970-04-30

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