Celebrity Inventors
Mark Twain (Samuel L. Clemens) received Patent No. 121,992 for "An Improvement in Adjustable and Detachable Straps for Garments." He later received two more patents: one for a self-pasting scrapbook and one for a game to help players remember important historical dates.
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| Number | Title | Issue Date |
| 7415043 | Code division multiple access (CDMA) method and apparatus for protecting and authenticating wirelessly transmitted digital information A spread spectrum method and apparatus for protecting and authenticating wirelessly transmitted digital information using numerous techniques. The apparatus may be a wireless code division multiple access (CDMA) communication system, a base station, a wireless trans... | 08/19/2008 |
| 7184986 | Content transaction system and method, and program providing medium therefor A user device receives the content, and pays a content fee, based on the usage control policy of the content, by electronic money up to the allowable amount of money set in an issue log. The user device then creates a usage log including a content identifier and sen... | 02/27/2007 |
| 7099292 | Spread spectrum communications using a reference and a message signal system and method A spread spectrum remote unit produces a message signal having message data. A reference signal is produced. The reference signal is used to recover the message data from a combined spread spectrum signal. The reference signal and the message signal is combined as a... | 08/29/2006 |
| 7020114 | Spread spectrum communication system and method using a reference signal and a plurality of message signals A spread spectrum communication system produces a reference signal. A plurality of message signals are produced. Each message signal has message data. The reference signal and the plurality of message signals are combined as a combined spread spectrum signal. The co... | 03/28/2006 |
| 7015850 | Bandwidth limited sampling circuit of high linearity A bandwidth limited sampling circuit of high linearity may be implemented by using a first circuit portion to limit the bandwidth of the input signals, and using a second circuit portion to sample the bandwidth limited input signal. The first circuit portion and the... | 03/21/2006 |
| 7003021 | System and method for generating signal waveforms in a CDMA cellular telephone system A system and method for communicating information signals using spread spectrum communication techniques. PN sequences are constructed that provide orthogonality between the users so that mutual interference will be reduced, allowing higher capacity and better link ... | 02/21/2006 |
| 6925071 | Spread spectrum base station A spread spectrum remote unit produces a message signal having message data. A reference signal is produced. The reference signal is used to recover the message data from a combined spread spectrum signal. The reference signal and the message signal is combined as a... | 08/02/2005 |
| 6917601 | Spread spectrum remote unit A spread spectrum remote unit produces a message signal having message data. A reference signal is produced. The reference signal is used to recover the message data from a combined spread spectrum signal. The reference signal and the message signal is combined as a... | 07/12/2005 |
| 5742756 | System and method of using smart cards to perform security-critical operations requiring user authorization The specification describes a user security system for use in conjunction with an operator terminal such as a personal computer. The user security system utilizes an intelligent security token, commonly referred to as a Smart Card, for security-critical o... | 04/21/1998 |
| 5164985 | Passive universal communicator system A communication system includes a base station, called a "Controller" and one or more remote or satellite stations, each called a "Communicator". The controller arbitrates, controls and communicates with the communicators which are in range to receive its... | 11/17/1992 |
| 5040189 | Multiple frequency radio system employing pulse repeaters The pulse communication system includes a plurality of pulse repeaters 10 for receiving and transmitting pulse signals. Each of the pulse repeaters include a frequency controller 22 for selecting one of a sequence of transmit and receive frequencies. The ... | 08/13/1991 |
| 4649549 | Apparatus for synchronizing linear PN sequences A system and method are disclosed for synchronizning the linear PN sequences contained in a received spread spectrum signal, characterized by the provision of a resident PN generator that is responsive to the chip rate clock for producing a replica of the... | 03/10/1987 |
| 4607375 | Covert communication system The covert communication system comprises a first arrangement to translate binary "1" bits into different portions of a predetermined PN (pseudonoise) code sequence and primary "0" bits into a complement of the different portion of the PN sequences, the P... | 08/19/1986 |
| 4606039 | Spread spectrum coding method and apparatus In a process for coding of radio transmissions by spectrum spreading, a signal is phase modulated by means of a 0-pi modulator controlled by a psuedo random sequence formed by combining in accordance with a logical majority function an odd number of eleme... | 08/12/1986 |
| 4581765 | Information security system A system is disclosed for encoding and decoding the audio signal portion of a television signal to prevent unauthorized reception of the audio signal. At the encoding stage, the audio signal is applied to a multiplier which combines the audio signal with ... | 04/08/1986 |
| 4216500 | Encoding and decoding system The frequencies of a channel containing at least one modulated carrier are encoded by heterodyning them with an alternating current wave having a cyclically varying frequency, and decoding of the encoded channel is achieved by deriving a signal correspond... | 08/05/1980 |
| 3995115 | Speech privacy system The communication of confidential information is generally accomplished by transforming applied message waves into an unintelligible form prior to transmission. Such a transformation may be accomplished by scrambling the applied message waves in either th... | 11/30/1976 |
