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File:USpatent425520 1890.gif
来自维基百科,自由的百科全书
Found in articles
File:USpatent425520 1890.gif
SPECIFICATION forming part of Letters Patent No. 425,520, dated April 15,
1890
. Application filed June 6, 1889. Serial No: 313,534. (No model.) To all whom
File:USpatent425520 1890.jpg
6 June 1889 Source U. S. patent No. 425520 Author REDDIN W. PARRAMORE Permission (Reusing this file) PD Other versions Image:
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