FR2121778B1 - - Google Patents

Info

Publication number
FR2121778B1
FR2121778B1 FR7200918A FR7200918A FR2121778B1 FR 2121778 B1 FR2121778 B1 FR 2121778B1 FR 7200918 A FR7200918 A FR 7200918A FR 7200918 A FR7200918 A FR 7200918A FR 2121778 B1 FR2121778 B1 FR 2121778B1
Authority
FR
France
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
FR7200918A
Other versions
FR2121778A1 (fr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CBS Corp
Original Assignee
Westinghouse Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Publication of FR2121778A1 publication Critical patent/FR2121778A1/fr
Application granted granted Critical
Publication of FR2121778B1 publication Critical patent/FR2121778B1/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive loop type
    • H04B5/266—
FR7200918A 1971-01-13 1972-01-12 Expired FR2121778B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US10603471A 1971-01-13 1971-01-13

Publications (2)

Publication Number Publication Date
FR2121778A1 FR2121778A1 (fr) 1972-08-25
FR2121778B1 true FR2121778B1 (fr) 1974-11-08

Family

ID=22309114

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7200918A Expired FR2121778B1 (fr) 1971-01-13 1972-01-12

Country Status (8)

Country Link
US (1) US3740488A (fr)
AU (1) AU3736171A (fr)
BE (1) BE777931A (fr)
CA (1) CA941308A (fr)
DE (1) DE2200784A1 (fr)
FR (1) FR2121778B1 (fr)
GB (1) GB1382257A (fr)
ZA (1) ZA718534B (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2543766B1 (fr) * 1983-03-28 1985-07-19 Inst Francais Du Petrole Procede de transmission de signal sans liaison electrique au travers d'une paroi conductrice, la coque d'un navire par exemple, et dispositif pour sa mise en oeuvre
US4652857A (en) * 1983-04-29 1987-03-24 Meiksin Zvi H Method and apparatus for transmitting wide-bandwidth frequency signals from mines and other power restricted environments
GB2163029B (en) * 1984-08-06 1987-11-18 Peter James Raynor Inductive communication system
GB8530772D0 (en) * 1985-12-13 1986-01-22 Gradwell Paul Stephen Communication system
USRE34976E (en) * 1987-07-24 1995-06-20 Richard J. Helferich Analog/digital voice storage cellular telephone
US5003576A (en) * 1987-07-24 1991-03-26 Richard J. Helferich Analog/digital voice storage cellular telephone
US4864301A (en) * 1987-07-24 1989-09-05 Richard J. Helferich Variable speed transmission recording and retrieval of data
US4905003A (en) * 1987-07-24 1990-02-27 Richard J. Helferich Analog/digital data storage system
USRE37618E1 (en) * 1987-07-24 2002-04-02 Richard J. Helferich Analog/digital data storage system
CA1311527C (fr) * 1988-05-02 1992-12-15 Kenneth E. Hjelmstad Systeme d'alarme-incendie electromagnetique pour mine souterraine
CA2646299C (fr) 2006-04-28 2014-12-02 Orica Explosives Technology Pty Ltd Procedes de commande de composants d'appareils de tir, appareils de tir et composants de ceux-ci
ES2330286B1 (es) * 2007-07-26 2010-09-21 Universidad De Zaragoza Metodo y dispositivo de transmision y recepcion de audio para comunicaciones bidireccionales mediante inyeccion de corriente.
US8270912B2 (en) * 2007-12-12 2012-09-18 Broadcom Corporation Method and system for a transformer in an integrated circuit package
US8198714B2 (en) * 2008-03-28 2012-06-12 Broadcom Corporation Method and system for configuring a transformer embedded in a multi-layer integrated circuit (IC) package
EP2438698A4 (fr) * 2009-06-03 2015-10-14 Marshall Radio Telemetry Inc Systèmes et procédés de communications par la terre
GB2563872B (en) 2017-06-28 2022-06-15 Kirintec Ltd Communications system

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2853557A (en) * 1955-01-28 1958-09-23 Dictograph Products Co Inc Sound distribution system
US2980793A (en) * 1956-06-11 1961-04-18 Electronic Safety Engineering Restricted range radio transmitting system
DE1015485B (de) * 1956-07-21 1957-09-12 Siemens Ag Bewegliche Mikrophonanordnung mit einem Mikrophonverstaerker, der insbesondere mit dem Mikrophon eine Baueinheit bildet
US3323063A (en) * 1964-08-07 1967-05-30 Theodore Granik System for re-diffusion of received radio signals
GB1031994A (en) * 1965-01-22 1966-06-08 John Davis & Son Derby Ltd Improvements in inductive signalling systems for mines, tunnels and similar situations
US3470474A (en) * 1966-12-23 1969-09-30 Donald E Bilger Underground radio communication system for highways
US3495209A (en) * 1968-11-13 1970-02-10 Marguerite Curtice Underwater communications system

Also Published As

Publication number Publication date
AU3736171A (en) 1973-06-28
CA941308A (en) 1974-02-05
DE2200784A1 (de) 1972-07-20
BE777931A (fr) 1972-07-12
FR2121778A1 (fr) 1972-08-25
ZA718534B (en) 1972-09-27
GB1382257A (en) 1975-01-29
US3740488A (en) 1973-06-19

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Legal Events

Date Code Title Description
ST Notification of lapse