Prisma Skyltreklam AB

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Patents Grantslast 30 patents

Information Patent Grant
Driving device for driving or operating elongate display members at...
- Patent number 5,161,421
- Issue date Nov 10, 1992
- Prisma Skyltreklam AB
- Stig E. A. Stigsson
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Incandescent matrix display with high frequency lamp driving
- Patent number 4,894,645
- Issue date Jan 16, 1990
- Prisma Skyltreklam AB
- Lars B. G. Odlen
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS

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