-
公开(公告)号：US1815796A
公开(公告)日：1931-07-21
申请号：US40441829
申请日：1929-11-02
Applicant: HENRY KLEIN AND COMPANY INC
Inventor： PREVOST STERETT R
IPC: G04B37/14
CPC classification number: G04B37/14
Search Results
1
records
(took 0.014 seconds)
筛选
AND
AND
过滤
NOT
NOT
Scan to Join
