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| Patents Granted on 1969-10-21 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,473,802 | Oct. 21, 1969 | O. Helmer, T.J. Gordon, H. Goldschmidt | Apparatus for playing a game involving forecasting of future events | ||
| 3,474,216 | Oct. 21, 1969 | J.M. Morgan, Jr. | Process Efficiency Detecting Circuit for Electrical Discharge Machining Apparatus | electrical discharge machining | |