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公开(公告)号:US950815A
公开(公告)日:1910-03-01
申请号:US1907381405
申请日:1907-06-29
Applicant: FRANK A CHAMPLIN , BURR JOHN A
Inventor: BURR JOHN A
公开(公告)号:US950815A
公开(公告)日:1910-03-01
申请号:US1907381405
申请日:1907-06-29
Applicant: FRANK A CHAMPLIN , BURR JOHN A
Inventor: BURR JOHN A