Electronic lock box with multiple modes and security states
US7420456B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 19, 2004 |
| Grant date | Sep 2, 2008 |
| Priority date | — |
| Expiry date | Jul 1, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07C2009/00936
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An electronic lock box contains a secure compartment for storing keys to a structure. A linear actuator moves in one direction opening the door to the secure compartment, and moves in the opposite direction releasing a shackle that holds the lock box to the structure. A lock box system uses an encryption algorithm to diversify user PIN data at a central computer, and stores that diversified information on a memory card for later use when the user attempts to access a lock box. The central computer and electronic lock box both keep track of system “epoch time,” and the memory card must be presented to the electronic lock box within a correct epoch time window for the diversified PIN data to be successfully decrypted and compared to the user's PIN data that is entered on a keypad of the electronic lock box.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.