U.S. patent number D630,312 [Application Number D/370,079] was granted by the patent office on 2011-01-04 for screw in fan. Invention is credited to Robert D. Spaulding.
United States Patent | D630,312 |
Spaulding | January 4, 2011 |
Inventors: | Spaulding; Robert D. (Milton, FL) |
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Appl. No.: | D/370,079 |
Filed: | June 4, 2010 |
Current U.S. Class: | D23/377 |
Current International Class: | 2304 |
Field of Search: | ;D23/377,379,385,411,413 ;416/5 ;D26/59,72,81-88 |
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