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| US4758536 | 18. Sept. 1986 | 19. Juli 1988 | AMP Incorporated | Receptacle for premise wiring system |
| US5455388 | 8. Juli 1993 | 3. Okt. 1995 | Thomas & Betts Corporation | Electrical floor box access cover |
| US5627340 | 7. Dez. 1994 | 6. Mai 1997 | Thomas & Betts Corporation | Floor box with improved activation ring |
