CA469573A - Ecrans de projection arriere - Google Patents

Ecrans de projection arriere

Info

Publication number: CA469573A
Authority: CA; Canada
Prior art keywords: projection screens; screens; projection
Prior art date: 1950-11-21
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

CA469573A

Other languages

Inventor

Washburn Kellogg Edward

Original Assignee

Radio Corporation of America

Publication date

1950-11-21

1950-11-21 Application granted granted Critical

1950-11-21 Publication of CA469573A publication Critical patent/CA469573A/fr

Status Expired legal-status Critical Current

CA469573A Ecrans de projection arriere Expired CA469573A (fr)

Application Number	Priority Date	Filing Date	Title
CA469573T

Publication Number	Publication Date
CA469573A true CA469573A (fr)	1950-11-21

Application Number	Title	Priority Date	Filing Date
CA469573A Expired CA469573A (fr)			Ecrans de projection arriere

Country	Link
CA (1)	CA469573A (fr)

Publication	Publication Date	Title
CA469403A (fr)	1950-11-14	Ecrans de projection
CA468044A (fr)	1950-09-12	Acylaceto guanazoles
CA466325A (fr)	1950-07-04	Ecran pour rayons de chaleur
CA465470A (fr)	1950-05-30	Jalousie
CA477428A (fr)	1951-10-02	Ecrans de projection
CA467332A (fr)	1950-08-15	Ecrans de projection transportables
CA454677A (fr)	1949-02-15	Plaque de crible
CA466310A (fr)	1950-07-04	Groupe de projection
CA469927A (fr)	1950-12-05	Ecrans de projection d'images
CA465093A (fr)	1950-05-16	Perforateur a papier
CA469000A (fr)	1950-10-31	Plasticiseurs
CA467595A (fr)	1950-08-29	Petoires
CA469058A (fr)	1950-10-31	Contre-vitrage
CA479191A (fr)	1951-12-11	Cribles
CA469816A (fr)	1950-12-05	Projecteurs cinematographiques
CA466093A (fr)	1950-06-27	Ecran de projection
CA464689A (fr)	1950-04-25	Ecran luminescent
CA471819A (fr)	1951-02-27	Materiaux pour moustiquaires
CA463796A (fr)	1950-03-21	Rouleau extensible pour fenetre
CA473787A (fr)	1951-05-22	Ecrans portatifs de projection
CA467877A (fr)	1950-09-05	Matiere a photocopie
AU149949B2 (en)	1950-08-10	New Quinoxaline-din-Oxides
CA467371A (fr)	1950-08-15	Supports de grilles d'internement
CA463527A (fr)	1950-03-07	Methode d'enregistrement par photographie
CA463526A (fr)	1950-03-07	Methode d'enregistrement par photographie