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| Number | Title | Issue Date |
| 4364112 | Miniature computer with separate hand-held controller A miniature computer has a main section which includes a central processor, a read only memory storing a monitor program, a random access memory for executing the monitor program and a controlling circuit for peripheral equipment, and a hand-held controll... | 12/14/1982 |
| 4308561 | Miniature computer A reproducing circuit is provided for reproducing digital information recorded in a cassette tape by frequency modulation in which different first and second digital logic levels are respectively represented by first and second repeated signals having res... | 12/29/1981 |
| 4253143 | Miniature computer capable of using a conventional audio cassette tape deck as an auxiliary memory A minature computer comprising a main section which includes a central processor, a read only memory storing a monitor program, a random access memory for executing the monitor program and a controlling circuit for peripheral equipments developed which ha... | 02/24/1981 |