Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Electrical property
Patent
1975-07-01
1977-04-05
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Electrical property
D1004
Patent
active
D02439328
REFERENCES:
patent: 3622877 (1971-11-01), MacDavid
patent: 3866114 (1975-02-01), Johnston
patent: D149975 (1948-06-01), Rupley
patent: D227901 (1973-07-01), Slocum
Holtje Nelson C.
Kurland Lawrence G.
Vec/Trak Research & Development Corporation
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