Semaphore

Details Semaphore Semaphore

1978-08-07

1982-12-07

Rosen, Sam

Measuring, testing, or signalling instruments

Security or signal instrument or casing

Visual

D1006

Patent

active

D02671581

REFERENCES:
patent: D114864 (1939-05-01), Muir
patent: 2941185 (1960-06-01), Mullikin
patent: 3206744 (1965-09-01), Nelson
Dreyfuss-Symbol Source book-published 1972, p. 143, line 1 left; p. 146, line 4 left, line 5 right; p. 148, line 3, center and right.

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