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| Patents for Du-Fast, Inc. | |||||
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| Number | Date | Patentee | Title | Type | |
| GB-677,518 | Aug. 20, 1952 | S.D. Robins | Improvements in or relating to mounting devices for rubbing machines | handheld power sanders | |
| 2,614,369 | Oct. 21, 1952 | S.D. Robins | Sanding or rubbing attachment | handheld power sanders | |
| CA-495,386 | Aug. 18, 1953 | S.D. Robins | Rubbing devices for attachment to hand drilling machines | handheld power sanders | |
| 2,722,789 | Nov. 08, 1955 | S.D. Robins | Rubbing attachment for portable rotary power units | handheld power sanders | |