Patent search ap:("STALEY MFG CO A E") AND inv:"KRAUDEL ROBERT L" Page 1

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发明授权
Drain cleaner 失效

公开(公告)号：US3503890A

公开(公告)日：1970-03-31

申请号：US3503890D

申请日：1966-07-29

Applicant: STALEY MFG CO A E

Inventor： DAVISSON MARIAN C , KRAUDEL ROBERT L

IPC: C11D1/62 , C11D1/18 , C11D1/38 , C11D1/50 , C11D3/26 , C11D7/32

CPC classification number: C11D1/62

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