Patent search ap:("EDWARD OLSON DONALD") AND inv:"EDWARD OLSON DONALD" Page 1

1.

发明授权
Concentric intake and exhaust valves for internal combustion engines and the like 失效
Title translation: 用于内燃机的同心进气和排气阀等

公开(公告)号：US2756732A

公开(公告)日：1956-07-31

申请号：US41691554

申请日：1954-03-17

Applicant: EDWARD OLSON DONALD

Inventor： EDWARD OLSON DONALD

IPC: F01L1/28 , F01L1/44

CPC classification number: F01L1/28 , F01L1/446

Patent Agency Ranking