Apparatus for positioning an article on a wall

Details Apparatus for positioning an article on a wall Apparatus for positioning an article on a wall

1975-03-21

1976-09-28

McGraw, Vincent P.

Optics: measuring and testing

Fiducial instruments

Artificial reference

356138, 356172, G01C 912, G01C 916

Patent

active

039828395

ABSTRACT:
An apparatus which provides a reference light beam projected onto one and preferably all the walls of a room whereby a reference line is provided for positioning articles thereon.

REFERENCES:
patent: 3393321 (1968-07-01), Frungel
patent: 3820903 (1974-06-01), Kindl
patent: 3854820 (1974-12-01), Hansen
patent: 3858984 (1975-01-01), Denton et al.

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