Patent search ap:("DORR OLIVER INC") AND inv:"OLIVER JR EDWIN L" Page 1

1.

发明授权
Filter construction 失效

公开(公告)号：US2964194A

公开(公告)日：1960-12-13

申请号：US65336457

申请日：1957-04-17

Applicant: DORR OLIVER INC

Inventor： OLIVER JR EDWIN L , DWIGHT RICHARDS

IPC: B01D29/00 , B01D33/00

CPC classification number: B01D33/23

Patent Agency Ranking