Seal system

Abstract

The seal system is comprised of a custom integrated circuit utilizing a special CMOS gate-array technology that can be utilized to build inexpensive tamper-resistant electronic seals. The electronic circuit includes a special analog as well as digital, single-chip circuitry that senses the state of the seal, and when interrogated, transmits that state via a 35-bit data word to a seal reader device, allowing remote monitoring and control of containers and expensive goods. Any attempt to tamper with the seal will be recorded in the circuit for later transmittal to the hand-held seal reader/verifier. Each seal has a unique 20-bit identification number, combined with a 6-bit random seal code and a 6-bit resistance value. The seal electronics may be utilized in a way to provide several types of seals, namely, a shipping container seal, an event triggering seal, and event logging seal, and a tamper-proof seal as well as combinations thereof.

Dependencies are inferred from the claim text.