4. Education and demonstration
  5. Question or problem eliciting response
  6. Correctness of response indicated to examine by...

Roger I. Burrows

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Interactive book

Education and demonstration – Audio recording and visual means – Visual information in book form
Patent

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Magnetically interactive substrate for a book

Amusement devices: toys – Having permanent magnet – And member movable in spaced relation to moving magnet
Reexamination Certificate

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Magnetically interactive substrate for a book

Amusement devices: toys – Having permanent magnet – And member movable in spaced relation to moving magnet
Reexamination Certificate

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Magnetically interactive substrates

Coating processes – Direct application of electrical – magnetic – wave – or... – Magnetic field or force utilized
Reexamination Certificate

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Teaching or amusement apparatus

Education and demonstration – Question or problem eliciting response – Correctness of response indicated to examine by...
Patent

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Profile ID: LFUS-PAI-P-1431052

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