Counter

Details Counter Counter

1987-05-11

1990-10-09

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Volume, flow or rate

Patent

active

D03111474

REFERENCES:
patent: D181467 (1957-11-01), Feddick
patent: D224058 (1972-06-01), Rudduck
patent: D253812 (1980-01-01), Novak
patent: D288181 (1987-02-01), Matsubayashi
patent: 416027 (1889-11-01), Billings
patent: 488206 (1892-12-01), Jubb
patent: 555218 (1896-02-01), Matsson
patent: 3064888 (1962-11-01), Van De Mark
patent: 3123291 (1964-03-01), Madry
patent: 3254836 (1966-06-01), Corpian
patent: 3617708 (1971-11-01), Bongiovanni
patent: 4341630 (1985-09-01), Dirks

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