The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 29, 1991
Filed:
May. 10, 1988
Stephan E Mangold, Alingsas, SE;
Diaphon Development AB, Molndal, SE;
Abstract
A programmable hearing aid has a serial data interface for receiving data transmissions, a decoder for decoding data transmissions, a program memory which stores program data values received via the serial interface, and read control logic that transmits the program data stored in the program memory when the decoder detects the receipt of a predefined read signal. Programming begins with the sending a set of program data values to the programmable hearing aid, preceded by a predefined write signal. The hearing aid automatically mutes or inhibits its operation upon receiving the write signal. A first checksum value corresponding to the program data values sent to the programmable hearing aid is calculated. Next, the data stored in the hearing aid is checked by sending a predefined read signal to the hearing aid, causing the hearing aid to transmitting the program data stored in its program memory. A second checksum value corresponding to the program data transmitted by the hearing aid is calculated and compared with the first checksum value. If the first and second checksum values do not match an error signal is generated and the hearing aid remains muted. If the checksum values do match, an unlock signal is sent to the hearing aid, causing the hearing aid to resume normal operation.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile