Portable peak flow meter

Details Portable peak flow meter Portable peak flow meter

1991-07-22

1992-12-29

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Volume, flow or rate

D10 83, D10 85

Patent

active

D03320634

REFERENCES:
patent: 2292474 (1942-08-01), Paxton
patent: 3367324 (1968-02-01), De Bono
patent: 4693256 (1987-09-01), Talonn
patent: 4878502 (1989-11-01), Dietz
patent: 4944306 (1990-07-01), Alvino

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