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| Patents Granted on 1983-09-06 | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,402,106 | Sep. 06, 1983 | C.A. Mattson | Blower attachment for cleaning rain gutters | ||
| 4,402,222 | Sep. 06, 1983 | N.J. Kot, G.A. Kaufman, T.P. Becker, C.B. Stout, D.D. Grover, G.E. Olson | Bolt Load Determining Apparatus | ||