Peak flow meter

Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Volume – flow or rate

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Details

D10 78, D24166

Patent

active

D03674339

REFERENCES:
patent: D24070 (1895-02-01), La Roche
patent: D51285 (1917-09-01), Mapel
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patent: 4420229 (1983-12-01), Lewis
patent: 4638812 (1987-01-01), Hakinen
patent: 5012812 (1991-05-01), Stockwell
patent: 5253651 (1993-10-01), Stockwell et al.

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