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| All Patents in class 327/356 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,586,838 | Jun. 22, 1971 | R.M. Henderson | Arithmetic Circuit Including Multiplying and Dividing Circuitry | electronic circuitry and apparatus | |
| 3,588,479 | Jun. 28, 1971 | R.M. Henderson | Circuit for Performing Multiplication by Character Selection Utilizing a Pair of Unijunction Transistors | electronic circuitry and apparatus | |