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公开(公告)号：US1722855A
公开(公告)日：1929-07-30
申请号：US14754526
申请日：1926-11-10
Applicant: ERNEST OWEN ALFRED , WILFORD DOWNS ROBERT
Inventor： ERNEST OWEN ALFRED , WILFORD DOWNS ROBERT
IPC: B60B23/00
CPC classification number: B60B23/00
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公开(公告)号：US1700072A
公开(公告)日：1929-01-22
申请号：US27642828
申请日：1928-05-09
Applicant: ERNEST OWEN ALFRED , WILFORD DOWNS ROBERT
Inventor： ERNEST OWEN ALFRED , WILFORD DOWNS ROBERT
IPC: B21D53/26
CPC classification number: B21D53/268 , Y10T29/49517
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公开(公告)号：US1736748A
公开(公告)日：1929-11-19
申请号：US28952128
申请日：1928-06-30
Applicant: ERNEST OWEN ALFRED , COMMON SCOTT ALBERT
Inventor： ERNEST OWEN ALFRED , COMMON SCOTT ALBERT
IPC: B21D53/90
CPC classification number: B21D53/90
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