Patent search ap:("NORTHROP CORP") AND inv:"BARNES JR ROSWELL P" Page 1

1.

发明授权
Acoustic transducer 失效
Title translation: 声换能器

公开(公告)号：US3403234A

公开(公告)日：1968-09-24

申请号：US39568464

申请日：1964-09-11

Applicant: NORTHROP CORP

Inventor： BARNES JR ROSWELL P

IPC: G01D5/24 , G01G3/16 , G01L1/14 , G01L5/14 , H04R19/02 , H04R19/04

CPC classification number: H04R19/04 , G01D5/24 , G01G3/16 , G01L1/14 , G01L5/14 , H04R19/02

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