Peak flow meter

Details Peak flow meter Peak flow meter

1991-11-18

1993-01-05

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Volume, flow or rate

D24166

Patent

active

D03322297

REFERENCES:
patent: D24070 (1895-02-01), La Roche
patent: D51285 (1917-09-01), Mapel
patent: D53023 (1919-02-01), Roesch
patent: D263166 (1982-02-01), Bushman
patent: D304232 (1989-10-01), Fuller
patent: D311699 (1990-10-01), Mo
patent: 3862628 (1975-01-01), Williams
patent: 3880591 (1975-04-01), Burroughs
patent: 3940984 (1976-03-01), Oram
patent: 3958565 (1976-05-01), Wright
patent: 4019382 (1977-04-01), El-Gammal
patent: 4210155 (1980-07-01), Grimes
patent: 4287775 (1981-09-01), Hutton
patent: 4292853 (1981-10-01), Williams et al.
patent: 4294262 (1981-10-01), Williams et al.
patent: 4420229 (1983-12-01), Lewis
patent: 5012812 (1991-05-01), Stockwell

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