Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Geometric
Patent
1981-02-04
1983-09-27
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Geometric
D1004
Patent
active
D02707160
REFERENCES:
patent: 297719 (1984-04-01), Root
patent: 2356311 (1944-08-01), Geier
Popular Science-11/45-p. 177-Radial Hole Level.
Granath Bruno
Karlsson Lars-Gunnar
Holtje Nelson C.
Kalmar Last Makin Verkstad AB
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