Tung-Hsien Chen

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Keelung City, TW

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Patents Grantslast 30 patents

Information Patent Grant
Hammer head assembly for power hammer
- Patent number 6,598,775
- Issue date Jul 29, 2003
- De Poan Pneumatic Corp.
- Tung-Hsien Chen
- B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
Information Patent Grant
Hammer head assembly used in an air nailing gun for driving U-nails
- Patent number 6,585,142
- Issue date Jul 1, 2003
- Tung-Hsien Chen
- B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
Information Patent Grant
Portable punching machine
- Patent number 6,442,847
- Issue date Sep 3, 2002
- Tung-Hsien Chen
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...