Life ring

Details Life ring Life ring

1976-05-21

1977-11-29

Blix, Trygve M.

B63C 908

Patent

active

040598594

ABSTRACT:
Life ring having apertured main body of foamed plastic with a secondary ring rigidly attached to it by connecting members.

REFERENCES:
patent: 175828 (1876-04-01), Fife
patent: 1156749 (1915-10-01), Brown
patent: 3032789 (1962-05-01), Fedorowicz
patent: 3594836 (1971-07-01), Robertson

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