| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 21 | Plural frequency responsive circuits for portable receiving sets | US69822357 | 1957-11-22 | US3022493A | 1962-02-20 | OTTO TSCHUMI; HANS KAPPELER; HANS BOLCHLINGER; ALOIS ZIMMERMANN |
| 22 | Pocket type radio receiver construction | US58152556 | 1956-04-30 | US2924705A | 1960-02-09 | JONES DONALD R |
| 23 | INDUCTIVE POSITION DETERMINATION | US15532159 | 2015-12-03 | US20170310118A1 | 2017-10-26 | Thomas Erdmann; Ajoy Palit |
| A device for the inductive positioning comprises a signal generator, a coil connected with the signal generator, an element for influencing the inductance of the coil depending on its distance to the coil and an evaluator to determine the position of the element with regard to the coil on the basis of a voltage on the coil. The signal generator thereby provides a square wave signal. | ||||||
| 24 | Facilitating wireless connections using a BLE beacon | US14248273 | 2014-04-08 | US09648652B2 | 2017-05-09 | John Hastings Granbery |
| Systems and methods are provided for facilitating wireless connections using a Bluetooth® low energy (BLE) beacon installed at a location. In particular, the provided systems and methods may facilitate wireless connections by providing credentials for accessing a wireless network at the location when a user checks in to the location using a user device in communication with the BLE beacon. The provided systems and methods may further facilitate wireless connections by establishing a Wi-Fi Direct connection with the user device to quickly provide content to the user device while at the location. | ||||||
| 25 | COMMUNICATING WITH AN OWNER OF AN OBJECT WITHOUT THE OWNER'S CONTACT INFORMATION | US14257103 | 2014-04-21 | US20150304802A1 | 2015-10-22 | Raghuswamyreddy Gundam; Karthik Kolavasi; Douglas W. Oliver |
| A method of communication includes a communication hub receiving a message via short range wireless communication directly from a first mobile communication device that is proximate to the communication hub at the time the message is transmitted, and the communication hub receiving the message and automatically forwarding the message via a mobile communications network to a second mobile communication device that is associated with the communication hub without the first mobile communication device identifying the second mobile communication device. | ||||||
| 26 | COMMUNICATING WITH AN OWNER OF AN OBJECT WITHOUT THE OWNER'S CONTACT INFORMATION | US14256006 | 2014-04-18 | US20150304801A1 | 2015-10-22 | Raghuswamyreddy Gundam; Karthik Kolavasi; Douglas W. Oliver |
| A computer program product includes a computer readable storage medium having program instructions embodied therewith, where the program instructions are executable by a processor to cause the processor to perform a method of communication. The method includes a communication hub receiving a message via short range wireless communication directly from a first mobile communication device that is proximate to the communication hub at the time the message is transmitted, and the communication hub receiving the message and automatically forwarding the message via a mobile communications network to a second mobile communication device that is associated with the communication hub without the first mobile communication device identifying the second mobile communication device. | ||||||
| 27 | Method, device, and system for "listen-before-talk" measurement to enable identifying of one or more unoccupied RF sub-bands | US11990523 | 2005-11-24 | US20090146791A1 | 2009-06-11 | Joni Jantunen; Hannu Laine; Antti Lappetelainen; Sassan Iraji |
| The invention relates to a method of performing a Listen-Before-Talk measurement to enable identifying of one or more unoccupied radio frequency sub-bands applicable for radio frequency identification (RFID) communication operable with a radio frequency identification (RFID) reader subsystem; said method including obtaining timing information relating to one or more periods of activity of a wireless communication subsystem; deriving information about one or more periods of non-activity from said timing information; configuring said wireless communication subsystem to perform said Listen-Before-Talk measurement in coordination with said one or more periods of non-activity; and performing said Listen-Before-Talk measurement by the means of the wireless communication subsystem to identify said one or more unoccupied radio frequency sub-bands. | ||||||
| 28 | Portable receiver with two antennae | US10485864 | 2004-02-05 | US20040248544A1 | 2004-12-09 | Christian Lamothe |
| The invention relates to a portable receiver comprising two antennae (10, 20) which are designed to receive an external electromagnetic signal in a given frequency range, and which are orientated along different axes. The receiver also comprises two phase shifter circuits (12, 22) each connected to an antenna, and multiplexing means (24) to which are connected in input said phase shifter circuits and in output a receiving unit receiving the external phase-shifted electromagnetic signal. Moreover there are provided, between at least one of the phase shifter circuits (12) and the antenna (10) connected to this circuit, correction means (Rcor, Ccor) which are a function of said phase shifter means, of said multiplexing means and of the antennae. The correction means are designed to provide, in output of the phase shifter circuits, first and second electrical signals substantially phase-shifted by an angle of null/2, one with respect to the other and substantially equal in amplitude. | ||||||
| 29 | Method and apparatus for measuring the inherent capacitance of a circuit supporting substrate | US18132 | 1993-02-16 | US5749049A | 1998-05-05 | Nicholas Jacob Worp |
| An electronic device includes a substrate (200) for supporting electrical circuits (202), the substrate (200) including first and second opposing surface areas (204 and 206). At least first and second electrical contacts (214 and 216) are disposed on the substrate 200 and are electrically coupled to at least first and second conductive plates (210 and 212), respectively. The first and second conductive plates (210 and 212) are disposed on the first and second opposing surface areas (204 and 206) of the substrate (200), respectively. Preferably, the first and second conductive plates (210 and 212) at least partially overlap with each other. The first and second conductive plates (210 and 212) form a capacitive element therebetween for determining excessive variability in composition of the substrate as indicated by a measured inherent capacitance of the substrate at the capacitive element that is outside a specified tolerance of the capacitive element (200). | ||||||
| 30 | Radio communication system | US522377 | 1983-07-21 | US4507646A | 1985-03-26 | Inge Hamlin; Andre Beudat |
| A paging system for use in a limited area such as an office, a factory building, a hotel, or other public building wherein the existing electrical supply network is used as the antenna of either the transmitter or the receiver. The electrical supply network is capacitively coupled to the transmitter in the preferred embodiment and in addition supplies power to the unit. | ||||||
| 31 | Call signal encoding transmitter | US72355558 | 1958-03-24 | US3063045A | 1962-11-06 | BUNCH JAMES I |
| 32 | Communication by induction | US74266058 | 1958-06-17 | US3043916A | 1962-07-10 | BARBER SNEATH OSWALD |
| 33 | Communication system | US75097758 | 1958-07-25 | US2918571A | 1959-12-22 | ROBERT PETH |
| 34 | Calling system | US51033155 | 1955-05-23 | US2870435A | 1959-01-20 | DE GRAAF NICOLAAS ROBERT |
| 35 | イベント報知装置、及び、イベント報知システム | JP2012061699 | 2012-03-19 | JP5821726B2 | 2015-11-24 | 諸星 博 |
| 36 | Locator system, portable information terminal, and locator | JP2012272409 | 2012-12-13 | JP2014120799A | 2014-06-30 | TSUJI KANJI; IKEDA YUTAKA; SOTOZONO SHINYA |
| PROBLEM TO BE SOLVED: To provide a locator system, a portable information terminal, and a locator which realize a specific device (the locator) of a small size and low price, the locator being easy to find when its sight is lost, by cooperating with a highly-functional portable information terminal.SOLUTION: The portable information terminal regularly performs an operation of periodically calling the locator and positional information calculation using the GPS and stores self position data in a storage unit. As the portable information terminal records the self position data before and after the losing of the sight is turned out, a map can be displayed on the basis of the self position data, so that the whereabouts of the locator can efficiently be found. | ||||||
| 37 | Underground communication method and substantially safe current limitter circuit | JP13048688 | 1988-05-30 | JPH01125129A | 1989-05-17 | RARII JII SUTORACHIIKU; KURUTO EI SUMOOKAA; JIERARUDO JIEI BOASU; UIRIAMU II MONTO; MAABUIN ERU HAAZENATSUKU JIYUN; JIEEMUZU ERU ZATSUPANCHI; SESU EI SUMISU; EDOWAADO DEI MUUA |
| PURPOSE: To make it possible to transmit an MF radio signal up to a ground base station over a long distance by using repeaters to be double transceivers rigidly connected to existing conductors in a mine. CONSTITUTION: An underground communication equipment includes a portable radio equipment 22, a portable radio equipment 26, a pager 27, a mobile radio equipment 24, and a ground base station 30 and all of them are connected by a backbone network for the repeaters 28, 29. Messages sent from respective radio equipments 22, 24, 26 in the communication equipment are respectively received by the repeaters 28, 29, each received message is amplified by the repeaters 28, 29 and transmitted up to the ground station 30 by two different kinds of frequency bands over a long distance up to other radio equipments 22, 24, 26 in the communication system. The radio equipments 22, 24, 26, the pagers 27, and the repeaters 28, 29 are respectively provided with substantially safe current limiter circuits. Thus the underground communication equipment capable of executing mutual communication among plural radio equipments 22, 24, 26, the repeaters 28, 29 and the base station 30 by using intermediate radio signals. COPYRIGHT: (C)1989,JPO | ||||||
| 38 | JPS58501979A - | JP50345382 | 1982-11-12 | JPS58501979A | 1983-11-17 | |
| 39 | Ningenyobidashisochi | JP8320975 | 1975-07-08 | JPS5132203A | 1976-03-18 | HANSU TSUAANTO |
| 40 | Facilitating wireless connections using a BLE beacon | US15590658 | 2017-05-09 | US10091836B2 | 2018-10-02 | John Hastings Granbery |
| Systems and methods are provided for facilitating wireless connections using a Bluetooth® low energy (BLE) beacon installed at a location. In particular, the provided systems and methods may facilitate wireless connections by providing credentials for accessing a wireless network at the location when a user checks in to the location using a user device in communication with the BLE beacon. The provided systems and methods may further facilitate wireless connections by establishing a Wi-Fi Direct connection with the user device to quickly provide content to the user device while at the location. | ||||||
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