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:
Aug. 08, 2000
Filed:
Mar. 22, 1999
Yonald Chery, Cambridge, MA (US);
Andrew Kelley, III, Cambridge, MA (US);
William P Moyne, Cambridge, MA (US);
Matthew D Verminski, Cambridge, MA (US);
Virtual Ink, Corp., Boston, MA (US);
Abstract
In a transcription system including a plurality of signal receivers positioned adjacent a writing surface, a method for calibrating the transcription system by determining separation distances between the signal receivers comprising: using times of flight of position signals from at least two calibration marks to the signal receivers to determine separation distances between the at least two calibration marks and the signal receivers; and using the determined separation distances between the calibration marks and the signal receivers and the known separation distances between the calibration marks to determine separation distances between the signal receivers.