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US 5,475,375 AGranted
Electronic access control systems
AssigneeSupra Products, Inc.
InventorsMartin A. Barrett, Wayne F. Larson
Life of this patent
Estimating the term…
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AssigneeSupra Products, Inc.
InventorsMartin A. Barrett, Wayne F. Larson
Estimating the term…
An access control system provides a database in an access control device (i.e. key) and includes procedures assuring that the database, and a master database, are kept up to date. In the particular context of a real estate lockbox system, the keys are provided with a database detailing houses listed for sale in the local area. Updates to this personal database are conditioned on users first uploading to a master database data that their keys have collected in their course of their interactions with lockboxes. Additional features include the provision of statistical data on listing and agent data, a menu by which the access device solicits user feedback on a property just visited, and scheduling appointments to show certain listed properties. Radio communications are used in certain embodiments for updating the database and exchanging other data between the access devices (i.e. keys) and a clearinghouse.
In a method of operating an electronic lock system, the system including a plurality of electronic locks and a plurality of electronic keys, the method including using an electronic key to gain access to an area secured by the electronic lock, an improvement comprising:
A method of maintaining a personal database from data stored in a central database, the personal database being maintained in a hand-held device, the method comprising:
In an electronic key for an electronic real estate lockbox, the key including a display, a lockbox communications port, a memory and a keypad;
Dependencies are inferred from the claim text.