Robert C. Clapper

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Grafton, WI, US

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Patents Grantslast 30 patents

Information Patent Grant
Scrolling sign with manually operated change mechanism
- Patent number 5,896,688
- Issue date Apr 27, 1999
- Milwaukee Sign Co., Inc.
- Robert B. Aiken
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Sign mechanism having traversable web
- Patent number 5,598,651
- Issue date Feb 4, 1997
- Milwaukee Sign Co., Inc.
- Robert B. Aiken
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS