发明授权
- 专利标题: Railway-switch.
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申请号: US1900023704申请日: 1900-08-31
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公开(公告)号: US674983A公开(公告)日: 1901-05-28
- 发明人: PENNOCK FREDERICK G
- 申请人: NEW ERA CAR APPLIANCE COMPANY INC , WILLIAM M CAMPBELL , PENNOCK FREDERICK G
- 专利权人: New Era Car Appliance Company Inc,William M Campbell,Frederick G Pennock
- 当前专利权人: New Era Car Appliance Company Inc,William M Campbell,Frederick G Pennock
- 优先权: US1900023704 1900-08-31
公开/授权文献
- US683193A Coal-auger post. 公开/授权日:1901-09-24
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