Celebrity Inventors
Glam girl Heddy Lamar may have used her good looks to good effect on the silver screen, but she put her smarts to better use as an inventor. During World War II, she co-patented a frequency-switching system for torpedo guidance that was considered years ahead of its time.
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| Number | Title | Issue Date |
| 8035466 | High frequency electrical connector A coaxial to transmission line connector has a connector and an attachment area with a windowed electrical attachment point that when soldered in place on a ground reference of an electrical device, creates an electrical and mechanical connection between an outer co... | 10/11/2011 |
| 6105006 | Transaction authentication for 1-way wireless financial messaging units A secure financial messaging unit (906) includes a wide area radio frequency receiver (804), a selective call decoder (1004), a financial transaction processor (1014), a main processor (1006), and a message origination unit (1034). The message origination... | 08/15/2000 |
| 6064869 | Suppression of noise between phase lock loops in a selective call receiver and method therefor A synthesizer (100) is used for generating a plurality of synthesized clock signals (128, 156). The synthesizer includes a clock source (102) for generating a common frequency reference signal (103), and a clock generator (104) coupled to the common frequ... | 05/16/2000 |
| 6041314 | Multiple account portable wireless financial messaging unit A portable secure financial messaging unit (906) includes a receiver (804) and a selective call decoder (1004). The selective call decoder (1004) has a memory (1010) that includes plurality of unique selective call addresses each corresponding with a pred... | 03/21/2000 |
| 6038549 | Portable 1-way wireless financial messaging unit A secure messaging system including a secure messaging system controller (1100) and a first financial messaging unit (906). A user initiates a financial transaction by providing a transaction authentication code to the secure messaging system controller (... | 03/14/2000 |
| 6009450 | Finite field inverse circuit A finite field inverse circuit has a finite field data unit (1112) and an inverse control unit (1110). The inverse control unit includes (1110) a kl and ku decrementer pair (1108, 1122), a kl -ku difference unit... | 12/28/1999 |
| 5982895 | Finite field inverse circuit for use in an elliptic curve processor A finite field inverse circuit (600) for use in an elliptic curve processor (12). The finite field inverse circuit (600) comprises a control circuit (610) and a data circuit (660). The data circuit (610) comprises a data multiplexer (668) for coupling the... | 11/09/1999 |
| 5852730 | Hybrid instruction set for versatile digital signal processing system A programmable versatile digital signal processing system architecture (FIG. 5) allows the implementation of functions for transmitting and receiving a variety of narrow and wide-band communication signaling schemes. The flexibility of the architecture (F... | 12/22/1998 |
| 5848355 | Frequency synthesizer correction using a temperature responsive divisor control An automatic frequency control is implemented in a selective call receiver (100) having a controllable frequency synthesizer (203). The output frequency of the synthesizer an is derived from a frequency reference element (205). A temperature sensor (206) ... | 12/08/1998 |
| 5789973 | Resistorless operational transconductance amplifier circuit A resistorless amplifier circuit uses integrated operational transconductance amplifiers to realize a plurality of circuit transfer functions. The preferred embodiment produces an output signal voltage Vout (500) that is either gm1 /... | 08/04/1998 |
| 5761615 | Wide band zero if quadrature demodulator using a intermediate frequency and a single local oscillator A low power zero-IF selective call receiver has a local oscillator (106) that generates an injection signal for a first mixer (104) and a pair of quadrature phase related injection signals (122, 124) for a pair of second mixers (112, 114). The first mixer... | 06/02/1998 |
| 5748082 | Light sensitive switch for alerting devices A light sensitive switch for the activation of an alerting circuit (70) to be used as an electronic alerting device (50). Alerting device (50) may be used in publications such as a magazine (78) or book (94) to enhance the printed material by audio visual... | 05/05/1998 |
| 5740524 | Feed-forward RSSI assisted radio frequency amplifier power control A selective call receiver (100) includes a radio frequency amplifier (202) having an output power level that is controllable. A radio frequency level sensor (500) generates a sensor output signal in response to an input signal level received at the radio ... | 04/14/1998 |
| 5714943 | Radio data interface device A radio data interface device (201) for facilitating communication of at least one selective call message with at least one messaging subscriber (202, 202', 202"). The radio data interface device comprises a microcontroller (208) including at least one el... | 02/03/1998 |
| 5710639 | Scan line compressed facsimile communication system A selective call receiver includes a receiver (103), a controller (105), and a display (113) for presenting a recovered source document. The receiver (103) provides a received paging message that was generated from the facsimile message of the original so... | 01/20/1998 |
| 5666350 | Apparatus and method for coding excitation parameters in a very low bit rate voice messaging system An apparatus codes excitation parameters for very low bit rate voice messaging using a method that processes a voice message to generating speech parameters. The speech parameters are separated (316) to produce a first group of energy parameters and a sec... | 09/09/1997 |
| 5640681 | Boot-strapped cascode current mirror A cascode current mirror circuit includes a cascode connected input stage (401) that operates to conduct an input current (400) in response to an input voltage of an input signal coupled to an effective transconductance of the cascode connected input stag... | 06/17/1997 |
| 5630222 | Method and apparatus for generating multiple signals at multiple frequencies A frequency synthesizer (100) is used for generating a plurality of signals operating at a plurality of frequencies that are integer multiples of a reference frequency. The frequency synthesizer (100) includes a plurality of phase lock loops coupled to a ... | 05/13/1997 |
| 5568134 | Selective call receiver with computer interface message notification A selective call messaging peripheral (100) capable of receiving at least one message and communicating it to an electronic information processing device (200) comprises a microcontroller (105) including a processor (106) for executing a microcode program... | 10/22/1996 |
| 5564092 | Differential feed-forward amplifier power control for a radio receiver system A selective call receiver (100) includes a radio frequency amplifier (202) having an output power level that is controllable. A radio frequency level sensor (500) generates a sensor output signal in response to an input signal level received at the radio ... | 10/08/1996 |
| 5564089 | Current controlled variable frequency oscillator having an improved operational transconductance amplifier A current controlled variable frequency oscillator (260) operates at a characteristic frequency that is determined primarily by a scaled current. A filter cascade (320) receives the scaled current for setting a filter cascade frequency substantially equal... | 10/08/1996 |
| 5563910 | Recursive baud rate detection method and apparatus A selective call receiver (5) has a programmable baud detector (12, 14) which is programmed (30) to test (33) for an absence of a paging signal having a predetermined baud rate at a first falsing rate and the programmed (36) to test (38) for either the pr... | 10/08/1996 |
| 5535444 | Diode loaded feed-forward radio frequency amplifier power control A selective call receiver (100) includes a radio frequency amplifier (202) having an output power level that is controllable in an unconditionally stable manner. The selective call receiver (100) includes a loading diode (403) coupled to an output of the ... | 07/09/1996 |
| 5512886 | Selective call receiver with computer interface A selective call messaging peripheral (100) capable of receiving at least one message and communicating the at least one message to an electronic information processing device (200). An information signal is received and demodulated to provide a recovered... | 04/30/1996 |
| 5483687 | Operational transconductance amplifier track and hold system A voltage track and hold circuit operates to track a tuning voltage and holding the tuning voltage (404) as a reference voltage (408). In the track mode, the track and hold circuit includes a first operational transconductance amplifier (401) and a first ... | 01/09/1996 |
| 5381138 | Intelligent over-the-air programming A selective call receiver includes receiver circuitry (20) and decoder circuitry (32). The receiver circuitry (20) receives selective call signals, including reprogramming messages (100). The decoder circuitry (32) decodes the reprogramming messages (100)... | 01/10/1995 |
| 5379030 | User friendly channel selection in a selective call receiver and method therefor A selective call receiver (100) comprising an information display (118) and a processor (106) operationally coupled to the information display (118). The information display (118) presents at least information representing an area map (402) with a plurali... | 01/03/1995 |
| 5379031 | Method and apparatus for conversion of maildrop message to selective call individual message A method and apparatus in a selective call receiver allow a user to receive maildrop message without losing access to previously received but unread maildrop messages in the same message slot. The selective call receiver comprises an address correlator (1... | 01/03/1995 |
| 5327578 | Radio telephone system supporting automatic busy and out-of-range indications A radio telephone communication system (200) having a base station (203) including at least one frequency agile time division duplex transceiver (207) for facilitating communication with at lest one radio telephone (100) on the at least one radio frequenc... | 07/05/1994 |
