Number | Name | Date | Kind |
---|---|---|---|
2124008 | Roth | Jul 1938 | |
3610693 | Solarek | Oct 1971 | |
3741157 | Krause | Jun 1973 | |
3784297 | Ito et al. | Jan 1974 | |
3795025 | Sadamitsu | Mar 1974 | |
3807853 | Hudson | Apr 1974 |
Entry |
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Abbott, T. D. "Adjustable Diameter Cleaning Brush" IBM Technical Disclosure Bulletin, vol. 14, No. 7, Dec. 1971, pp. 2010-2011. |