Steve J. McHenry

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Inver Grove Heights, MN, US

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Patents Grantslast 30 patents

Information Patent Grant
Sign system with field changeable screen size and message
- Patent number 6,414,650
- Issue date Jul 2, 2002
- Addco
- Timothy J. Nicholson
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Changeable message sign system with reconfigurable sign screen
- Patent number 6,150,996
- Issue date Nov 21, 2000
- ADDCO, Inc.
- Timothy J. Nicholson
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS

Patents Applicationslast 30 patents

Information Patent Application
Outdoor sign with sealed sign module
- Publication number 20010037591
- Publication date Nov 8, 2001
- Timothy J. Nicholson
- G06 - COMPUTING CALCULATING COUNTING