Overhead projector

Details Overhead projector Overhead projector

1987-05-26

1989-01-03

Haroian, Harry N.

Optics: image projectors

Miscellaneous

353DIG3, 353DIG6, 353 98, 353DIG5, G03B 2100

Patent

active

047952520

ABSTRACT:
A portable overhead projector has a top surface which slopes downwardly from the rear wall to the front wall and includes stops on the top surface adjacent to the front wall for preventing a transparency from sliding off the top surface during use and to preset the distance of the leading edge of the transparency from the bottom edge of the protecting wall.

REFERENCES:
patent: 1598569 (1926-08-01), Fitzhugh
patent: 2273361 (1942-02-01), Kozloff
patent: 2529664 (1950-11-01), Roysher
patent: 2699704 (1955-01-01), Fitzgerald
patent: 2772485 (1956-12-01), Gelb
patent: 2811892 (1957-11-01), Holloway
patent: 3366005 (1968-01-01), Benedict
patent: 3542463 (1970-11-01), Klein
patent: 3653754 (1972-04-01), Yamanaka
patent: 3889914 (1975-06-01), Torme

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