Navigational aid

Details Navigational aid Navigational aid

1988-02-17

1991-02-26

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Geometric

Patent

active

D03149218

REFERENCES:
patent: D111492 (1938-08-01), Hassenfeld
patent: D135635 (1942-10-01), von Burg
patent: D195421 (1963-06-01), Huguenin
patent: D220209 (1971-03-01), Brigham
patent: D255431 (1980-06-01), Marmorale
patent: D286751 (1986-11-01), Hsieh
patent: D288668 (1987-03-01), Flury
patent: D297527 (1988-09-01), Iacovelli
patent: D305739 (1990-01-01), Raitmaa
patent: 4404752 (1983-09-01), Hanna
patent: 4438568 (1984-03-01), Kramer
patent: 4462164 (1984-07-01), Norman
Gutmann Cutlery, Inc., 11/1982, p. 66, Watch bottom left.
Gutmann Cutlery, Inc., 11/1982, p. 68, Compass top right.
Gutmann Cutlery, Inc. 11/1982, p. 69, 2 Compasses top of page.
Hong Kong Enterprise, 4/1984, p. 209, Watch #1528.

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