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:
Oct. 26, 2004
Filed:
May. 16, 2002
Chiaki Nakamura, Chiba, JP;
Kazuo Kato, Chiba, JP;
Yutaka Saitoh, Tokyo, JP;
Kazuo Matsubara, Tokyo, JP;
Tsutomu Tanaka, Tokyo, JP;
Seiko Instruments Inc., Chiba, JP;
Abstract
To provide a power supply apparatus that replaces a dry battery by detecting electric field energy in a free space, rectifying the energy, extracting the energy as electric power, and accumulating the electric power. In particular, there is provided a power supply apparatus that is useful for a portable electronic equipment. An electromagnetic energy conversion unit collects a radio wave propagating in the air and converts collected electromagnetic energy into electric power. A rectifying unit generates electric power having a DC waveform by rectifying electric power having an AC waveform and charges the rectified electric power having the DC waveform into a secondary battery. An electric load is supplied with the rectified electric power having the DC waveform or with electric power having a DC waveform discharged from the secondary battery.