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Van Baggem Johannes Wilhelmus: System for determining the listening and viewing habits of wave signal receiver users. Intomart, Breiner A W, November 19, 1974: US3849729 (101 worldwide citation)

The invention relates to a system and device for recording the tuning and working condition of a radio or television set. A record codes the time of any channel change as well as data about operating time after the change. The coding is characterized by means of a series of binary tones identifying ...


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Apparatus for determining the listening and viewing habits for radio and television receiver users respectively. Intomart, April 9, 1975: GB1389717-A (3 worldwide citation)

1389717 Recording use of receivers INTOMART NV 24 Nov 1972 [26 Nov 1971] 54373/72 Heading H3Q A system for recording the listening and viewing habits of radio and television receiver users, comprises means 18, 22 for transmitting to a recording medium at predetermined intervals a signal to define co ...


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Improvements relating to systems for determining the listening habits of wave signal receiver users. Intomart, Frederik Adolf Nauta, Fredericus Albertus Becht, May 14, 1969: GB1151710-A (1 worldwide citation)

1,151,710. Recording use of receivers; switching circuits. FREDERIK ADOLF NAUTA, and FREDERICUS ALBERTUS BECHT, [trading as INTOMART, INSTITUT VOOR TOEGEPAST MARKTONDERZOEK]. 13 Sept., 1966 [14 Sept., 1965; 25 Aug., 1966], No. 40923/66. Headings H3Q and H3T. To record the use of a radio receiver by ...


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CAMIEL JOHANNES PETER CAMPS: [fr] Systèmes et procédés de mesure de lexposition aux médias, [de] Systeme und Verfahren zur Messung der Exposition gegenüber Medieninhalten, [en] Systems and methods for measuring exposure to media. INTOMART GFK GROUP, February 27, 2013: EP2562948-A2

[en] A method for measuring the reach of media content distributed within time slots of a radio or television broadcast or other media outlet. Statistics representative of audience exposure to such media content are derived from recollections gathered from a first quantity of respondents who, collec ...