Key Operated Patents (Class 235/59R)
Miscellaneous key operated recording (Class 235/59A)
Multiplying unitary base (Class 235/59BC)
Wahl type (Class 235/59BD)
Flat bed (Class 235/59BE)
Attachment for typewriters (Class 235/59BF)
Clear sign printing (Class 235/59CP)
Power operated (Class 235/59BG)
Total printing (Class 235/59TP)
Typewriter (Class 235/59T)
Addendoraphs (Class 235/59BH)
  • Electronic device for independently erasing secret and non-secret data from memory
    Patent number: 4926388
    Abstract: In an electronic appliance capable of storing secret data to be kept secret and data other than the secret data in distinction from each other, only the secret data can be erased upon a first reset operation and the data other than the secret data can be erased upon a second reset operation.
    Type: Grant
    Filed: May 25, 1988
    Date of Patent: May 15, 1990
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hisao Kunita, Akitaka Morita, Eichika Matsuda