Direction indicator for navigation

Details Direction indicator for navigation Direction indicator for navigation

1992-11-20

1995-01-24

Wirthlin, Alvin

Geometrical instruments

Indicator of direction of force traversing natural media

Magnetic field responsive

33349, 33355R, G01C 1702

Patent

active

053832809

ABSTRACT:
An electronic audio/visual direction indicator for underwater or other types of navigation which gives unobtrusive and continuous directional feedback without the need for manual manipulation.

REFERENCES:
patent: 3237584 (1966-03-01), Keithley, Jr.
patent: 4104803 (1978-08-01), Hoeppel
patent: 4250626 (1981-02-01), Lazar
patent: 4255866 (1981-05-01), Sears
patent: 4774766 (1988-10-01), Posseme
patent: 4920656 (1990-01-01), Cross
patent: 4953304 (1990-09-01), Raitmaa et al.
patent: 5175936 (1993-01-01), Sato
patent: 5187871 (1993-02-01), McDermott

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