Eric V. Johnstone

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Round Rock, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Multi-tone photomask and method for manufacturing the same
- Patent number 6,803,160
- Issue date Oct 12, 2004
- Dupont Photomasks, Inc.
- Eric V. Johnstone
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY

Patents Applicationslast 30 patents

Information Patent Application
Photomask and method for maintaining optical properties of the same
- Publication number 20060134534
- Publication date Jun 22, 2006
- Laurent Dieu
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Multi-tone photomask and method for manufacturing the same
- Publication number 20030118920
- Publication date Jun 26, 2003
- DuPont Photomasks, Inc.
- Eric V. Johnstone
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY