Programmable cartridge telephone communication system
December 1, 2002. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References Re30671 Programmable calculator Cartridge programmable video game apparatus Program controlled communication system having individually rearrangeable line selection Television set/calculator interface including exchangeable keyboard panel and program memory cartridge Communication system selective call screening arrangement Multifunction telephone with message information and control information circuits for connecting stations and common equipment in a telephone network Electronic point-of-sale system using direct-access storage Billing recorder with non-volatile solid state memory Terminal emulator InventorsAssigneeApplicationNo. 06/445982 filed on 12/01/1982US Classes:711/115, Detachable memory379/166, Detail of line circuit or line card379/284With processorExaminersPrimary: Zache, Raulfe B.Attorney, Agent or FirmInternational ClassH04M 9/00 (20060101)AbstractA cartridge comprising circuitry and program instructions is added to a processor controlled telephone communication system to selectively change the operating system in accordance with the cartridge used. | |
