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| Patents Granted on 1982-04-06 | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,322,918 | Apr. 06, 1982 | C.I. Steinback | Abrasive grinding machine | sanding machines | |
| 4,322,919 | Apr. 06, 1982 | D.J. Gerber | Self-centering feed mechanism for an abrasive grinding machine | sanding machines | |