Edwin K. W. Ching

Follow

Person

Tamuning, GU

People

Patents Grantslast 30 patents

Information Patent Grant
Flat drill bit with opposing vertical cutting edges
- Patent number 5,626,446
- Issue date May 6, 1997
- Edwin K. W. Ching
- B27 - WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL NAILING OR STAPLING MACH...