IP Library › Granted Patent US 6,443,648
Granted Patent Utility
US 6,443,648 · App. 09/969,811

Ballpoint pen with a ball bearing of shape memory alloy

Inventor: Chung-Ping Chao
Patented Case View Patent ↗
Granted: Sep 3, 2002 Filed: Oct 4, 2001
Inventor
Chung-Ping Chao

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Quick Facts
Patent No.
US 6,443,648
App. No.
09/969,811
Filed
2001-10-04
Granted
2002-09-03
Kind
B1