1
Fumio Watanabe, Yoshikazu Itoh, Shunji Wake: Apparatus for collecting television channel data and market research data. Video Research, Ikegami Tsushinki, Spencer & Frank, February 27, 1990: US04905080 (108 worldwide citation)

A data collecting apparatus is used in a survey system in which research data such as television audience ratings and market research data is collected by a data collecting device provided in each of a plurality of panelists' homes, the collected research data is sent to a data center through teleph ...


2
Yoshikazu Itoh, Shunji Wake: Data processing apparatus. Ikegami Tsushinki, Video Research, Spencer & Frank, February 25, 1992: US05091877 (20 worldwide citation)

A data processing apparatus for use in an electronic data research system in which data produced at respective panelist' home is transmitted to a data center via a telephone link which is commonly used by a telephone set of the panelist' home, there are provided a center call mode in which the data ...