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| US6000609 | 22 dec 1997 | 14 dec 1999 | Security People, Inc. | Mechanical/electronic lock and key therefor |
| US6552650 | 30 aug 1996 | 22 apr 2003 | | Coin collection lock and key |
| US6564601 | 4 feb 2002 | 20 maj 2003 | | Electromechanical cylinder plug |
| US6927670 | 14 jun 2000 | 9 aug 2005 | Security People, Inc. | Conventional mechanical lock cylinders and keys with electronic access control feature |
| US7334443 | 24 feb 2003 | 26 feb 2008 | Master Lock Company LLC | Radio frequency electronic lock |
| US7397343 | 16 aug 2004 | 8 jul 2008 | Security People, Inc. | Conventional mechanical lock cylinders and keys with electronic access control feature |
| US8122746 | 21 aug 2007 | 28 feb 2012 | | Electromechanical cylinder plug |
| US8141399 | 19 maj 2003 | 27 mar 2012 | | Electromechanical cylinder plug |
