Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Balancer
Patent
1975-12-08
1978-03-07
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Balancer
D1004
Patent
active
D02474280
REFERENCES:
patent: D138392 (1944-08-01), Bernard
patent: D181107 (1957-10-01), Rexroat
patent: D184619 (1959-03-01), Hammeter
patent: D201769 (1965-07-01), Rexroat
patent: 1893988 (1933-01-01), French
patent: 2270657 (1942-01-01), Kraft
patent: 2432124 (1947-12-01), Raines
patent: 2720110 (1955-10-01), Lucht
Drucker William A.
Holtje Nelson C.
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