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| Patents Granted on 1981-11-10 | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,299,377 | Nov. 10, 1981 | J.O. Lenz | Manually operated clamp effort intensifier for vise | machinist vises | |
| 4,299,398 | Nov. 10, 1981 | E.C. Wahl | Pressure Compensating Shaft Seal | shaft seals | |
| 4,300,086 | Nov. 10, 1981 | R.E. Stobbe, M.R. Cesarz | Control Circuit for A.C. Induction Motor | motor controls | |