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:
Feb. 25, 2014
Filed:
Jun. 08, 2010
Chung-fuu Mao, Hsin-Chu, TW;
Chia-jui Yeh, Taipei, TD;
Chung-Fuu Mao, Hsin-Chu, TW;
Chia-Jui Yeh, Taipei, TD;
Waltop International Corporation, Hsinchu, TW;
Abstract
The present invention relates to a new electromagnetic pen without a battery, and particularly relates to a new electromagnetic pen without a battery, which has two coils inside. An oscillator circuit and a resonance circuit are formed in the new electromagnetic pen respectively by the two coils. The oscillator circuit is formed for emitting electromagnetic signals to a tablet, and the resonance circuit is formed for receiving the electromagnetic energy emitted from the tablet. Therefore, unlike the conventional electromagnetic pen without a battery, which only receive the electromagnetic energy and emit the electromagnetic signals in a short period, the new electromagnetic pen of this invention can receive the electromagnetic energy emitted from the tablet continuously, so the oscillator circuit can emit the electromagnetic signals to the tablet continuously.