Pui Kum Lee

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White Bear Lake, MN, US

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Patents Grantslast 30 patents

Information Patent Grant
Method of forming a retroreflective material via light interference...
- Patent number 4,095,875
- Issue date Jun 20, 1978
- Minnesota Mining and Manufacturing Company
- Pui Kum Lee
- G02 - OPTICS
Information Patent Grant
Method of tagging with color-coded microparticles
- Patent number 4,053,433
- Issue date Oct 11, 1977
- Minnesota Mining and Manufacturing Company
- Pui Kum Lee
- C06 - EXPLOSIVES MATCHES
Information Patent Grant
Retroreflective material made by recording a plurality of light int...
- Patent number 4,036,552
- Issue date Jul 19, 1977
- Minnesota Mining and Manufacturing Company
- Pui Kum Lee
- G02 - OPTICS