Supra Products, Inc.

Slc Technologies

John W Sherman

Wayne F Larson

Walter G Henderson

George A Ellson

Gerald R Daum

John E Gray

Rockne M Olds

Jerry P Scansen

John Q Archer, Ii

Edgar J Unrein

John M Kniffin

Ron McCauley

Ralph H Wells, Iii

Ron M Chapin

Kenneth L Reviea

Lynn L Schreiner

Edgar J Urein

David Babler

Richard W Danler

A secure entry system makes use of radio transmissions to communicate with locks, keys, and related components throughout the system. The radio transmissions can be made using a paging system, a cellular telephone system, or any other RF carrier. Some embodiments employ a cellular telephone in lieu of an electronic key. Others integrate a paging receiver within an electronic key to provide a unit with dual functionality. The system is illustrated with reference to exemplary applications in the industrial site security, real estate lockbox, and transportation fields.

Secure entry system with radio communications

Access control device featuring key ordering or key simultaneity

An electronic real estate lockbox system includes a number of operational features, including facsimile reporting capability, bilateral locking solenoids, improved shackle latching capabilities, improved key-compartment release operation, two-wire bilateral lock-key communications, improved case design, viral lockout list propagation, an update code grace period, packet formatted data transmission with error recovery, FSK audio data downloading, and high security challenge-response authorization procedures. A variety of other operational features are also disclosed.

Electronic security system

A key for an electronic lock system is provided with circuitry capable of performing a plurality of lock-related functions. Stored in the key is characterization data that determines the key's particular functionality be electronically disabling certain ones of these functions, leaving just a subset of functions from which the operator may select. Keys having various capabilities can thus be electronically tailored from a single master design.

Electronic security system with configurable key

An electronic key for an electronic lock system is provided with graphical user interface which can display a plurality of symbols corresponding to a plurality of functions that the key can cause the lock to execute. An operator of the key moves a visual indicia among these symbols to select a desired function. The key then transmits instructions to the lock causing the selected function to be executed.

Electronic key with interactive graphic user interface

Battery power in an electronic lock system is conserved by delaying application of energy to the unlocking mechanism until a movable member, used to open the lock system, is moved.

Electronic lock with energy conservation features

A comprehensive real estate lockbox system is disclosed which provides a variety of operational features. Some of these features include the ability to: record all accesses to all lockboxes; transfer all or part of such records from the lockboxes to a supervising real estate agency or board; organize and review such records; facilitate operation of lockboxes that are mounted in awkward or poorly lit locations; limit lockbox accesses to preselected agents, agencies or boards; reprogram lockboxes in the field; monitor redundantly the status of the lockbox battery; record diagnostic information on each operation of a lockbox or key; render keys inoperative on predetermined dates; disable unauthorized keys; grant agents from remote real estate boards permission to open certain lockboxes, and; grant different keys different privileges.

Electronic real estate lockbox system

Growing community of inventors

Corvallis, OR, United States of America

John W Sherman