Don Dongcho Ha

Follow

Person

Long Beach, CA, US

People

Patents Grantslast 30 patents

Information Patent Grant
Disk tumbler lock and key, improved means and methods of manufactur...
- Patent number 6,957,556
- Issue date Oct 25, 2005
- Don Dongcho Ha
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES