The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 18, 1994
Filed:
Aug. 05, 1991
Richard W Danler, Corvallis, OR (US);
John W Sherman, Corvallis, OR (US);
David Babler, Vancouver, WA (US);
Ron M Chapin, Gervais, OR (US);
John M Kniffin, Portland, OR (US);
Kenneth L Reviea, Salem, OR (US);
Lynn L Schreiner, Corvallis, OR (US);
Supra Products, Inc., Salem, OR (US);
Abstract
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.