Claims
- 1. In an electronic key for use with an electronic lock, the key and lock being distinct from one another and movable relative thereto, the key including a microprocessor, a battery coupled to the microprocessor, a memory coupled to the microprocessor, a keypad including at least the digits 0-9, the keypad being coupled to the microprocessor, and a communications port for sending signals to the lock, an improvement comprising:a receiver for receiving electromagnetic radio frequency signals; and a decoder coupled to the receiver for providing data corresponding to a received radio frequency signal to the memory to change data stored therein; wherein characteristics of the key can be programmed remotely and wherein the characteristics stored in memory include a code representing an expiration date for said key.
Parent Case Info
This application is a continuation of U.S. application Ser. No. 07/864,958, filed Mar. 7, 1992, now abandoned, which is a division of U.S. application Ser. No. 07/806,801, filed Dec. 5, 1991, now U.S. Pat. No. 5,245,652, which is a continuation of Ser. No. 07/640,255, filed Jan. 11, 1991, now abandoned, which is a division of Ser. No. 07/303,711, filed Jan. 27, 1989, now U.S. Pat. No. 4,988,987, which is a continuation in part of Ser. No. 07/192,853, filed May 11, 1988, now abandoned, which is a division of Ser. No. 07/015,864, filed Feb. 17, 1987, now U.S. Pat. No. 4,766,746, which is a continuation in part of Ser. No. 06/831,601, filed Feb. 21, 1986, now U.S. Pat. No. 4,727,368, which is a continuation in part of Ser. No. 06/814,364, filed Dec. 30, 1985, now abandoned, which is a continuation in part of Ser. No. 06/788,072, filed Oct. 16, 1985, now abandoned. These applications and patents are incorporated herein by reference.
US Referenced Citations (40)
Foreign Referenced Citations (8)
Number |
Date |
Country |
307 485 |
Mar 1989 |
EP |
393784 |
Oct 1990 |
EP |
2542792 |
Mar 1983 |
FR |
2604808 |
Oct 1986 |
FR |
2144249 |
Feb 1985 |
GB |
WO 9013096 |
Apr 1989 |
WO |
WO 9118169 |
May 1991 |
WO |
WO 9120026 |
Jun 1991 |
WO |
Non-Patent Literature Citations (2)
Entry |
“Websters New World Dictionary” p. 1108 Definition of [Radio Frequency].* |
Marino, “Pager and Garage Door Opener Combination,” Motorola Technical Developments, vol. 10, Mar., 1990. |
Continuations (2)
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Number |
Date |
Country |
Parent |
07/864958 |
Apr 1992 |
US |
Child |
08/138555 |
|
US |
Parent |
07/640255 |
Jan 1991 |
US |
Child |
07/806801 |
|
US |
Continuation in Parts (4)
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Number |
Date |
Country |
Parent |
07/192853 |
May 1988 |
US |
Child |
07/303711 |
|
US |
Parent |
06/831601 |
Feb 1986 |
US |
Child |
07/015864 |
|
US |
Parent |
06/814364 |
Dec 1985 |
US |
Child |
06/831601 |
|
US |
Parent |
06/788072 |
Oct 1985 |
US |
Child |
06/814364 |
|
US |