Patents on Ultrasonic Communication

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Holder/Company Abstract Comment Links
Beepcard Inc. N. Altman, A. Antebi, A. Atsmon, M. Cohen, and Z. Lev, ―Computer communications using acoustic signals,‖ U.S. Patent 7,480,692 B2, Jan. 2009. A method of communicating with an electronic device. The method includes providing an electronic device having an audible sound receiving and generating sub-system including a microphone, transmitting from a source at least one acoustic signal encoded with information, receiving said at least one acoustic signal by said microphone and determining a spatial position, distance or movement of the microphone relative to the source, responsive to the received at least one signal. A rather general system for data transmission with ultrasound is presented https://www.google.com/patents/US7480692
IBM 2012, Patent US9082413: Electronic transaction authentication based on sound proximity A computer program product comprises computer usable program code for receiving data describing a proposed electronic transaction between first and second communications devices. Additional computer usable program code is provided for generating a first audio signal by sound detected by a first microphone of the first communications device, and for generating a second audio signal by sound detected by a second microphone that is part of the second communications device. Still further computer usable program code provides for authenticating that the first communications device and the second communications device are in the same proximity in response to determining that the first and second audio signals were produced by the same sound event, and for completing the proposed electronic transaction between the first and second communications device in response to authenticating that the first and second communications devices are in close proximity. Goal: Pairing mobile devices: “authenticating that the first and second communications devices are in close proximity.” https://www.google.com/patents/US9082413?dq=US20140129231&hl=de&sa=X&ved=0ahUKEwjJwYHe2dvSAhVD6xQKHUXFA1gQ6AEIHjAA
Lee Weinblatt 2002, Patent US 20030144035 A1: Electronically generating and displaying a reward coupon Purchase incentives are provided to consumers in the form of electronically-displayed reward coupons. No paper and ink is required. The consumer can make a real time selection of a coupon related to a product in a commercial being shown on television, for example. A code transmitted with that commercial is stored if the consumer makes a selection, and that code is used to retrieve coupon display data from a set of pre-stored coupons. The retrieved coupon data is displayed on a portable device such as a personal digital assistant (PDA). The displayed coupon is process by the merchant, such as by scanning a bar code displayed by the PDA with the coupon. Goal: Purchase incentives are provided to consumers in the form of electronically-displayed reward coupons. No paper and ink is required. The consumer can make a real time selection of a coupon related to a product in a commercial being shown on television, for example. A code transmitted with that commercial is stored if the consumer makes a selection, and that code is used to retrieve coupon display data from a set of pre-stored coupons.

They use audio for this: “The speaker produces pressure waves in the air that can be detected by a microphone, for example, and with a frequency that is in what is scientifically regarded as the audible range of human hearing”

https://www.google.com/patents/US20030144035?dq=Patent+US+20030144035+A1&hl=en&sa=X&ved=0ahUKEwiG4KCyp-TQAhWBrxoKHUw1BSUQ6AEIHTAA