|
| US4461127 | 18 Ene 1982 | 24 Jul 1984 | The Boeing Company | Abrading tool |
| US4493170 | 19 Nov 1981 | 15 Ene 1985 | The Boeing Company | Abrading tool |
| US4679360 | 22 May 1986 | 14 Jul 1987 | | Lamellar end grinding wheel |
| US4718204 | 9 May 1986 | 12 Ene 1988 | | Lamellar end grinding wheel |
| US5201149 | 27 Jun 1991 | 13 Abr 1993 | Gerd Eisenblaetter GmbH | Lamellar end grinding tool |
| US6743085 | 20 Nov 2001 | 1 Jun 2004 | 3M Innovative Properties Company | Rotating back up abrasive disc assembly |
| US6863596 | 25 May 2001 | 8 Mar 2005 | 3M Innovative Properties Company | Abrasive article |
| US7481699 | 23 May 2007 | 27 Ene 2009 | August Ruggeberg GmbH & Co. KG | Fan-type grinding wheel |