|
| US4035791 | 16 mai 1975 | 12 juil. 1977 | | Door alarm controlled by operation of door lock |
| US4904005 | 18 nov. 1988 | 27 févr. 1990 | Harrow Products, Inc. | Entrance security system |
| US5377513 | 5 janv. 1993 | 3 janv. 1995 | Miwa Lock Kabushiki Kaisha | Locking device |
| US6124792 | 25 nov. 1998 | 26 sept. 2000 | U-Haul International, Inc. | Latch integrated, tamper resistant, electro-magnetic alarm switch |
| US6249224 | 25 sept. 2000 | 19 juin 2001 | U-Haul International, Inc. | Latch integrated, tamper resistant, electro-magnetic alarm switch |