Pipeline plug

Details Pipeline plug Pipeline plug

1994-05-19

1997-04-01

Zarfas, Louis S.

Environmental heating and cooling; fluid handling and sanitary e

Fluid handling or treatment equipment

Fitting

Patent

active

D03786951

REFERENCES:
patent: D339949 (1993-10-01), Wei et al.
patent: D339950 (1993-10-01), Jung
patent: 414748 (1889-11-01), Bentley
patent: 754329 (1904-03-01), Milliken
patent: 1349072 (1920-08-01), Lines
patent: 1760750 (1928-04-01), Goodman
patent: 3276481 (1964-08-01), McNulty
patent: 3414140 (1966-08-01), Feldkamp
patent: 4492095 (1985-01-01), Brister
patent: 4612961 (1986-09-01), Vetter
patent: 4627470 (1986-12-01), Carruthers
patent: 5240031 (1993-08-01), Vigil
Cherne Industries Incorporated, Cherne Single-Size Test-Ball Plug, 1992, Product sheet, 1 page.

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