Side door casing spool for an oilwell casing

Details Side door casing spool for an oilwell casing Side door casing spool for an oilwell casing

1983-04-25

1986-12-16

Largen, James R.

Environmental heating and cooling; fluid handling and sanitary e

Heating or cooling

Element or attachment, not elsewhere specified

D15 21, D23 40

Patent

active

D02872641

REFERENCES:
patent: D34032 (1901-02-01), Gates
patent: D205916 (1966-10-01), Pelsue
patent: D208388 (1967-08-01), Graham
patent: D240428 (1976-07-01), Hoffman
patent: D245928 (1977-09-01), Frafjord
patent: D254266 (1980-02-01), Tableriou
patent: 1533404 (1925-04-01), Green

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