Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Regulator or control
Patent
1993-07-02
1994-06-07
Douglas, Alan P.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Regulator or control
D10 49
Patent
active
D03475840
REFERENCES:
patent: D190650 (1961-06-01), Reading
patent: D312216 (1990-11-01), Nadzak
patent: 4169382 (1979-10-01), Goldman et al.
patent: 4768706 (1988-09-01), Parfitt
patent: 4867102 (1989-09-01), Turano
patent: 4922226 (1990-05-01), Hsieh
Hunter Programmable Thermostats; Model 40001 & 40002; .COPYRGT.1990; cover.
Davis Antoine D.
Douglas Alan P.
Gernstein Terry M.
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