Pump for injecting an odorous material into a natural gas line

Machines not elsewhere specified – Pump or compressor

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D23 1, D99 99

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active

D02807270

REFERENCES:
patent: D182596 (1958-04-01), Jemison et al.
patent: D197999 (1964-04-01), Cordis
patent: D237312 (1975-10-01), Lombard
patent: D246976 (1978-01-01), Bell et al.
patent: 2921844 (1960-01-01), Hutchison
patent: 3854894 (1974-12-01), Klass
patent: 3939858 (1976-02-01), LeMay
LINC Brochure 1-81(c) Chemical Injection Pump, pp. 1 & 8.
Williams Instrument Co., Inc., Bulletin 1172-26A, Jan. 1, 1975, pp. 2 & 3, "Odorant Injector DSP-250" Item.

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