Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Volume – flow or rate
Patent
1992-09-02
1993-10-26
Douglas, Alan P.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Volume, flow or rate
D10103
Patent
active
D03406580
REFERENCES:
patent: D236190 (1975-08-01), Wibring
patent: D311346 (1990-10-01), Gross
patent: 3935727 (1976-02-01), Knoche et al.
patent: 3949593 (1976-04-01), Oertle
PULP-EL Electronic Pulp Consistency Transmitter, BCs150VA, Apr. 30, 1990 VALMET Automation (p. 2, item LS; p. 28, item 70; p. 31, item 16).
Hietaranta Matti
Ollila Simo
Davis Antoine D.
Douglas Alan P.
Valmet Automation Oy
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