Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Electrical property
Patent
1976-10-12
1979-01-09
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Electrical property
D1004
Patent
active
D02507552
REFERENCES:
patent: D120929 (1940-06-01), Hoke
patent: D122301 (1940-09-01), Reeves
patent: D154380 (1949-07-01), Gettleman
patent: D168324 (1952-12-01), Vogel
patent: 2295453 (1942-09-01), Denison
patent: 2892149 (1959-06-01), Persak
Blackman Ronald E.
Lentz Lawrence R.
Potter Donald M.
Champion Spark Plug Company
Holtje Nelson C.
Owen Allen
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