Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Geometric
Patent
1977-08-19
1979-09-18
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Geometric
D1004
Patent
active
D02529181
REFERENCES:
patent: D235318 (1975-06-01), Kooi
patent: D235319 (1975-06-01), Kooi
patent: D235524 (1975-06-01), Kooi
patent: D235525 (1975-06-01), Kooi
patent: 3475101 (1969-10-01), Jeffery
Keuffel & Esser Cat. #10, 1976, p. 32, Ni2, Self-Leveling Level.
Holtje Nelson C.
Keuffel & Esser Company
White Lionel N.
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