TREA

Racionalizacni a experimentalni laborator

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  • Praha, CS
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Patents Grantslast 30 patents

  • Information Patent Grant

    Universal apparatus for evaluating calendar data
    • Patent number 4,285,147
    • Issue date Aug 25, 1981
    • Racionalizacni a experimentalni laborator
    • Karel Kolar
    • G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
  • Information Patent Grant

    Universal round clock calendar
    • Patent number 4,285,148
    • Issue date Aug 25, 1981
    • Racionalizacni a experimentalni laborator
    • Karel Kolar
    • G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS

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