Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Regulator or control
Patent
1982-03-16
1984-05-29
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Regulator or control
Patent
active
D02740435
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patent: 3090192 (1963-05-01), Kraft
patent: 4316256 (1982-02-01), Hendricks
Centralab Cat. ELC-Z-1/14/77-p.3-Switch Assembly at bottom.
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