Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Volume – flow or rate
Patent
1986-02-28
1989-07-25
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Volume, flow or rate
Patent
active
D03023974
REFERENCES:
patent: D245482 (1977-08-01), Flinta
patent: D271085 (1983-10-01), Wohlers
patent: 3443431 (1969-05-01), Hagen
patent: 4645242 (1987-02-01), Coleman
Kalin Horst W.
Mesnard David R.
Dieterich Standard Corp.
Holtje Nelson C.
Spangler, Jr. Edwin L.
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