|
| US5181939 | 20 déc. 1989 | 26 janv. 1993 | | Article and a method for producing an article having a high friction surface |
| US5891204 | 23 mai 1997 | 6 avr. 1999 | | Article and a method for producing an article having a high friction surface |
| US6083631 | 10 avr. 1997 | 4 juil. 2000 | | Article and a method and apparatus for producing an article having a high friction surface |
| US6997790 | 6 août 2003 | 14 févr. 2006 | | Method of fabricating pliant workpieces, tools for performing the method and methods for making those tools |
| US7347769 | 10 févr. 2006 | 25 mars 2008 | | Method of fabricating pliant workpieces, tools for performing the method and methods for making those tools |