Long range image projector
United States Patent 2827831

Inventors:
Herbert, Elion
Thall, Walter H.
Publication Date:
03/25/1958
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Assignee:
Herbert, Elion
Thall, Walter H.
Primary Class:
353/62
Other Classes:
353/102, 362/308, 353/52
International Classes:
G09F19/18; G09F19/12
US Patent References:
1682163
1788142Projector
1800211Light-ray-projection apparatus
1815801Light projector
1935084Method and apparatus for projecting aerial signs
1989336Optical projection apparatus
2165246Apparatus for projecting aerial signs
2192886Optical system
2195392Projection apparatus