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| Patents Granted on 1972-05-30 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,665,650 | May 30, 1972 | W.C. Przygocki | Abrasive belt control apparatus and method | sanding machines | |
| 3,666,848 | May 30, 1972 | R.C. Harper | Method of Producing Closed Mold Polyurethane Foam Moldings Free of Surface Voids by Flushing the Mold with a Vaporized Halogenated Hydrocarbon | manufacturing processes | |