Double twist coil springs

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Patents Grantslast 30 patents

Information Patent Grant
Helically-wound cable and method
- Patent number 8,250,844
- Issue date Aug 28, 2012
- W. C. Heraeus GmbH
- Jacob E. Markham
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Method for producing helically wound filament elements, and filamen...
- Patent number 6,161,598
- Issue date Dec 19, 2000
- Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen mbH
- Juergen Eder
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
Twist `N` curl
- Patent number 5,966,811
- Issue date Oct 19, 1999
- Donna Zalusky
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
1953502
- Patent number 1,953,502
- Issue date Apr 3, 1934
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
1529441
- Patent number 1,529,441
- Issue date Mar 10, 1925
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...