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:
Jul. 01, 2003
Filed:
Jan. 22, 2001
Ronald J. Lebel, Sherman Oaks, CA (US);
Varaz Shahmirian, Northridge, CA (US);
Timothy J. Starkweather, Simi Valley, CA (US);
Philip T. Weiss, Pasadena, CA (US);
Daniel H. Villegas, Granada Hills, CA (US);
Robert C. Dennard, Lancaster, CA (US);
John T. Armstrong, Pasadena, CA (US);
John D. Richert, La Habra Heights, CA (US);
Medtronic Minimed, Inc., Northridge, CA (US);
Abstract
An implanted medical device (e.g. infusion pump) and an external device communicate with one another via telemetry messages that are receivable only during windows or listening periods. Each listening period is open for a prescribed period of time and is spaced from successive listening periods by an interval. The prescribed period of time is typically kept small to minimize power consumption. To increase likelihood of successful communication, the window may be forced to an open state, by use of an attention signal, in anticipation of an incoming message. To further minimize power consumption, it is desirable to minimize use of extended attention signals, which is accomplished by the transmitter maintaining an estimate of listening period start times and attempting to send messages only during listening periods. In the communication device, the estimate is updated as a result of information obtained with the reception of each message from the medical device.