Patent search ap:("ALUMINUM CO OF AMERICA" OR "BORG GEORGE W CORP") AND inv:"CARLSON CHESTER A" Page 1

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发明授权
Bearings for clocks, watches, and precision instruments 失效
Title translation: 钟表，精密仪器轴承

公开(公告)号：US2369338A

公开(公告)日：1945-02-13

申请号：US50517643

申请日：1943-10-06

Applicant: ALUMINUM CO OF AMERICA , BORG GEORGE W CORP

Inventor： CARLSON CHESTER A , BUTLER WILLIAM R

IPC: G04B31/012

CPC classification number: G04B31/012 , Y10S411/914 , Y10T29/49705 , Y10T29/49709

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