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| US4811797 | 21 oct. 1987 | 14 mars 1989 | Nauchno-Proizvodstvennoe Obiedinenie Po Mekhanizirovannomu Stroitelnomu Instrumentru I Otdelochnym Mashinam | Impact wrench |
| US4844177 | 7 août 1987 | 4 juil. 1989 | The Aro Corporation | Torque sensing, automatic shut-off and reset clutch for toggle controlled screwdrivers, nutsetters and the like |
| US6446735 | 23 janv. 2002 | 10 sept. 2002 | Tranmax Machinery Co., Ltd. | Torque restricting structure of pin hammer-type hammering mechanism |
| US6634438 | 1 juin 2001 | 21 oct. 2003 | Snap-on Technologies, Inc. | Pneumatic air tool with direct air path motor |
| US6983808 | 12 nov. 2004 | 10 janv. 2006 | | Power tool with oil circulation apparatus |
| US6988565 | 9 juil. 2002 | 24 janv. 2006 | Chicago Pneumatic Tool Company | Retrofit kit for a modular control apparatus for a power impact tool |
| US7185713 | 2 mars 2005 | 6 mars 2007 | Mi Jy-Land Industrial Co., Ltd. | Air-driven screwdriver performs hole drilling, thread tapping and bolt tightening |
