Inventor · disambiguated record

Sigurd Alfons Backlund

Also filed as: BACKLUND SIGURD ALFONS

2 granted patents·54 citations·filing 1975–1976

65Inventor score

Technology areasA62B

Files withBACKLUND SIGURD ALFONS1 KEMIRA OY1

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2 records

0185USD249279SExhaust valve of respiratory maskBACKLUND SIGURD ALFONS·Filed 1976·Granted Sep 5, 1978·36 cites·1 claims
0255US4057057ABreathing mask, especially a half mask or a full mask provided with an inner maskKEMIRA OY·Filed 1975·Granted Nov 8, 1977·18 cites·4 claims

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Sigurd Alfons Backlund — Patent Inventor | PatentIndex