railway sleepers or chains

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Patents Grantslast 30 patents

Information Patent Grant
2078082
- Patent number 2,078,082
- Issue date Apr 20, 1937
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
2061861
- Patent number 2,061,861
- Issue date Nov 24, 1936
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
2060782
- Patent number 2,060,782
- Issue date Nov 17, 1936
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
2023827
- Patent number 2,023,827
- Issue date Dec 10, 1935
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
1761672
- Patent number 1,761,672
- Issue date Jun 3, 1930
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
1667875
- Patent number 1,667,875
- Issue date May 1, 1928
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
1533026
- Patent number 1,533,026
- Issue date Apr 7, 1925
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...