Quotables
"I watched his countenance closely, to see if he was not deranged ... and I was assured by other senators after he left the room that they had no confidence in it."
U.S. Senator Smith of Indiana ; After seeing Samuel Morse demonstrate the telegraph.
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| Number | Title | Issue Date |
| 4868862 | Automobile telephone unit An automobile telephone unit (T) has a main body (11) located in a prescribed position in the cabin of an automobile, a telephone number dialing device (D) electrically connected to the main body (11), and a handset (12) electrically connected to the main... | 09/19/1989 |
| 4845772 | Portable radiotelephone with control switch disabling A portable radiotelephone with control switch disabling is disclosed. A flip element which contains a microphone and covers a keypad and other control buttons when in a closed position also activates a hookswitch. When the hookswitch and microprocessor in... | 07/04/1989 |
| 4792986 | Portable radio system with externally programmable universal device connector A computer-controlled portable radio communications device has RF and audio circuits controlled by a programmed computer in accordance with a predetermined modus operandi and includes an externally accessible multi-point electrical connector having input/... | 12/20/1988 |
| 4723265 | Abreviated dialer with reduced key operations A microprocessor-based telephone set includes a telephone number memory, a number indicator, an abbreviated number selecting switch, an abbreviated number controller, and a selecting signal controller. The call is made when a selecting signal is sent to a... | 02/02/1988 |
| 4647722 | Land mobile telephone system The present invention relates to a land mobile telephone system with enhanced operability realizing both the loud-speech and closed-speech operations by the single handset. The handset is installed detachably in a pad of a steering wheel of an automobile ... | 03/03/1987 |
| 4593409 | Transceiver protection arrangement A warning and protection circuit arrangement suitable for use in conjunction with a two-way portable transceiver having a removable battery pack/antenna includes a battery enclosure containing an antenna structure. A circuit is enclosed inside the battery... | 06/03/1986 |
| 4585903 | Cordless telephone A cordless telephone system which provides improved performance through a number of moved circuits including the use of a single oscillator in a remote unit for providing both a standard for the transmitted signal and a local oscillator signal. The remote... | 04/29/1986 |
| 4558177 | Regulated output current source for cordless telephones A circuit for providing a constant current to an output stage of a cordless telephone transmitter using AC power lines as a transmission medium to maintain the RF component on the AC lines to within regulated limits. The RF component is sensed to provide ... | 12/10/1985 |
| 4509201 | Wireless telephone apparatus with protection against power loss Two limit voltages are established for a wireless telephone apparatus. If the power supply voltage exceeds the first limit voltage, the transmitter of the wireless telephone apparatus is prevented from radiating signals. At the same time, the central proc... | 04/02/1985 |
| 4363935 | Mobile radio telephone system A vehicle radio telephone system includes, in addition to a handset associated with a telephone set, a wireless microphone detachable from the telephone set and a telephone receiver comprising a speaker contained in the telephone set. When a driver drives... | 12/14/1982 |
| 4221932 | Infrared remote signaling system A hands-free telephone system is disclosed utilizing an infrared transmitter and receiver to permit wireless speech transmission. The transmitter uses frequency modulation imposed on the infrared signal and includes carrier shift signaling arrangements fo... | 09/09/1980 |
| 4087638 | DTMF Communication system A highly flexible and economical dual tone multiple frequency (DTMF) communication system includes a data input source such as a keyboard; a repertory dialer or electronic memory; an integratable digital encoder which includes a digital sine wave synthesi... | 05/02/1978 |
