Set-square

Details Set-square Set-square

1988-05-25

1991-01-15

Dunkins, Bruce W.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Geometric

D10 65

Patent

active

D03137627

REFERENCES:
patent: D226226 (1973-01-01), Hogland
patent: D237364 (1975-10-01), Hoagland
patent: D237693 (1975-11-01), Hoagland
patent: 1111174 (1914-09-01), Ostringer
patent: 2752685 (1956-07-01), Zauner
patent: 3462846 (1969-08-01), Goerz
patent: 3473228 (1969-10-01), Hortmann et al.

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