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| All Patents in class 310/89 | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,866,319 | Sep. 12, 1989 | M.W. Crutchfield | Erasing machine | draftsman | |
| 6,043,575 | Mar. 28, 2000 | R.D. DeRome, M.S. Scolaro, A.P. Ghode | Power Tool with Air Deflector for Venting Motor Exhaust Air | ||
| 6,121,698 | Sep. 19, 2000 | J.H. Sexton | Oil Cooled Motor and Pump | submersible pumps | |