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. 26, 2016
Filed:
Aug. 29, 2012
Ken Gudan, Sunnyvale, CA (US);
Sergey Chemishkian, Cupertino, CA (US);
Jonathan J. Hull, San Carlos, CA (US);
Matthew S. Reynolds, Durham, NC (US);
Ken Gudan, Sunnyvale, CA (US);
Sergey Chemishkian, Cupertino, CA (US);
Jonathan J. Hull, San Carlos, CA (US);
Matthew S. Reynolds, Durham, NC (US);
RICOH CO., LTD., Tokyo, JP;
DUKE UNIVERSITY, Durham, NC (US);
Abstract
A method, system and tag for low power radio frequency communication are described. In one embodiment, the RF tag comprises: a radio, an energy harvesting unit operable to convert incident RF energy to direct current (DC), a storage unit to store recovered DC power, one or more sensors for sensing and logging data, and a microcontroller coupled to the energy harvesting and storage units, the one or more sensors and the radio, the microcontroller operable to wake up from a sleep state and cause the radio to communicate, sensed data from at least one of the one or more sensors while powered by energy previously harvested and stored by the energy harvesting and storage unit.