Pop-up sprinkler

Details Pop-up sprinkler Pop-up sprinkler

1975-12-22

1977-01-25

Largen, James R.

Environmental heating and cooling; fluid handling and sanitary e

Heating or cooling

Element or attachment, not elsewhere specified

D2301

Patent

active

D02431793

REFERENCES:
patent: 1800858 (1931-04-01), Buelna
patent: 1882922 (1932-10-01), Robinson et al.
patent: 3002696 (1961-10-01), Jenkins
patent: 3404841 (1968-10-01), Brittain et al.
patent: 3776463 (1973-12-01), Dyck
patent: D226711 (1973-04-01), Kunkle, Jr.

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