Navigational device

Details Navigational device Navigational device

1976-02-17

1978-09-19

Stephan, Steven L.

Optics: image projectors

Target, map or navigation projection

353 42, 353 77, 353 98, G03B 2122, G03B 2128

Patent

active

041149971

ABSTRACT:
A film projection device having a screen, light source, lens and mirror system and a reference indicator disposed immediately in front of the mirror for shadow casting a reference line onto the image of a film projected onto the screen via initial projection onto the mirror.

REFERENCES:
patent: 3094781 (1963-06-01), Vangor
patent: 3269258 (1966-08-01), Byrd et al.
patent: 3826579 (1974-07-01), Schurgin
patent: 3832050 (1974-08-01), Johannsen
patent: 3865477 (1975-02-01), Gast

Affiliated with

Also associated with

Rating

Navigational device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Navigational device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Navigational device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2116218