IP Library › Granted Patent US 6,808,380
Granted Patent Utility
US 6,808,380 · App. 10/019,658

Hardness taper tube and production method and device therefor

Inventors: Yukio Watanabe, Takeshi Kizuka
Patented Case View Patent ↗
Granted: Oct 26, 2004 Filed: Jan 2, 2002
Inventors
Yukio Watanabe
Takeshi Kizuka
Assignee (at issue)
GMA Co., Ltd.

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Quick Facts
Patent No.
US 6,808,380
App. No.
10/019,658
Filed
2002-01-02
Granted
2004-10-26
Kind
B1