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A sealed crustless sandwich for providing a convenient sandwich without an outer crust which can be stored for long periods of time without a central filling from leaking outwardly.
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| Number | Title | Issue Date |
| 4962528 | Beeper amplifier An amplifier in a housing for receiving and detecting the presence of portable paging devices that produce an audible signal when activated. The amplifier allows the connection of a large capacity annunciator or visual alarm. Circuitry is provided to conn... | 10/09/1990 |
| 4962524 | Cordless telephone apparatus and a method of controlling same A cordless telephone having a base unit and a plurality of radio telephone sets. The base unit delivers a ringing signal from a telephone line to a radio telephone set which is in telephone communication with a remote subscriber coupled to the telephone n... | 10/09/1990 |
| 4920557 | Radio communication apparatus A radio communication apparatus comprising a base unit connected to a communication line and a radio terminal unit connected to the base unit via radio circuit. When there is an incoming signal from the communication line in a state in which the radio ter... | 04/24/1990 |
| 4884294 | Portable cordless telephone set for outputting various discriminiation sounds with simple circuit construction A portable cordless telephone set for outputting various types of discrimination sounds, in radio communication with a base unit, and having a telephone transmission and reception portion. The portable cordless telephone set includes a sound generation co... | 11/28/1989 |
| 4882745 | Cordless headset telephone Cordless headset telephone system including at least one headset having at least one earpiece, a swingout microphone and a headset transmitter and receiver connected to a common antenna, at least one base having a base transmitter and receiver having a co... | 11/21/1989 |
| 4866753 | Telephone installation having a radio link A telephone installation comprising a PABX (4) connected to the telephone network, extensions connected to the PABX by inside connections (6), and additional intercommunication devices connected between the PABX and privileged extensions (2). Said additio... | 09/12/1989 |
| 4860337 | Rapid processing of immediately successive arrival signals in a base station of a radio communication network A base station (10), in a radio communication network having at least two telephone lines (111 to 11n) and a plurality of radio telephone sets (121 to 12m), includes radio transceivers (131 to 13k) capable of selecting one of a control channel and a plura... | 08/22/1989 |
| 4756018 | Multiple access communication system having loop-check circuitry for switching intraoffice connections A multiple access communication system comprises a central station connected to an end office switching system and a remote station which serves N subscriber telephones through respective line interface circuits. The remote station provides concentration ... | 07/05/1988 |
| 4754473 | Remote telephonic data transcribing system A telephonic communications system (FIGS. 1 and 2) designed to use the availability of ordinary subscriber telephone lines to which a telephone instrument (312) is conventionally attached. Whenever it is desirable for a caller (306 or 309) to transmit dat... | 06/28/1988 |
| 4742560 | Mobile radio unit in cellular wide range mobile communication system A mobile radio unit assures a wide area communication system having a function equal to a tracking exchange function and profitably employing an equipment of the existing exchange as it is. The mobile radio unit stores a secret number to assure a terminat... | 05/03/1988 |
| 4558178 | Wireless telephone apparatus including both a telephone handset and a telephone headset A wireless telephone apparatus is disclosed which includes an acoustic transmission apparatus employing a telephone handset for use during a normal telephone conversation mode and a telephone headset for use during a hands-free telephone conversation mode... | 12/10/1985 |
| 4528696 | Arrangement for providing signalling tones and volume control signals A keyboard with number and volume control pushbuttons is provided with a microcomputer, a digital-to-analog converter, and an output circuit to provide signalling tones to a radio transmitter in response to operation of the number pushbuttons, and to prov... | 07/09/1985 |
| 4450319 | Infrared telephone extension control system A portable telephone or other signaling system features a remote or portable unit responsive to operator voice and control signals to modulate infrared emitting diodes with narrowband, FM low duty cycle pulses which are received by a telephone network uni... | 05/22/1984 |
| 4421953 | Telephone tactile alert system A telephone user who cannot hear the telephone ringing is alerted, other than audibly, to the fact that the telephone must be answered. A radio transmitter at the telephone is driven by ringing voltage supplied to the instrument. The transmitter emits a r... | 12/20/1983 |
| 4355210 | Sub-miniature tone encoder with automatic number identification A digitally synthesized tone encoder and automatic number identification generator for a radio-telephone is presented herein. The system includes a tone burst generator for producing two audio tones simultaneously in response to either a keypad input or s... | 10/19/1982 |
| 4275271 | Sub-miniature radio telephone decoder Presented herein is a sub-miniature radio telephone decoder which through a unique arrangement of integrated circuits adapted to create frequency detectors and counters provide the means whereby a radio telephone receiver is held in a muted state until a ... | 06/23/1981 |
| 4130731 | Portable telephone system A portable telephone system which utilizes both a VOX and a duplexer network wherein the necessity for the transmission of a continuous signal and continuous receiver scanning is eliminated, thereby conserving power, and wherein the ringing signal is gene... | 12/19/1978 |
| 4129749 | Radio telephone communications system A radio telephone system comprising a base station and a plurality of portable units. The base station transmits information to portable units on a first frequency and the portable units transmit information to the base station on a second frequency. Each... | 12/12/1978 |
| 4103106 | Mobile radiotelephone apparatus and method Mobile radiotelephone apparatus including channel finding means for locating an available channel for placing a call from the mobile unit. The channel finding means may have means for cyclically reducing one of the input voltages received by the superviso... | 07/25/1978 |
| 4029901 | Control center for a communications system with interchannel patching capabilities A radio communication system of base stations, and a telephone system, are linked and controlled by a control center. A housing having a plurality of control modules electrically and mechanically engaged therein, each control module having a front panel w... | 06/14/1977 |
| 4028500 | Mobile unit supervisory control sequencer and method A mobile communication unit providing simplified calling procedures and thus an increase in the effective use of communication channels. An address signal representing a telephone system subscriber may be entered into a storage register in the mobile unit... | 06/07/1977 |
