| US 7,474,809 B2 | ||
| Implement for optically inferring information from a jotting surface and environmental landmarks | ||
| Stewart R. Carl, Palo Alto, Calif. (US); Marek Alboszta, San Francisco, Calif. (US); Michael J. Mandella, Palo Alto, Calif. (US); Hector H Gonzalez, Mountain View, Calif. (US); and Timothy Hawks, Menlo Park, Calif. (US) | ||
| Assigned to Electronic Scripting Products, inc., Palo Alto, Calif. (US) | ||
| Filed on Mar. 26, 2007, as Appl. No. 11/728,951. | ||
| Application 11/728951 is a continuation in part of application No. 10/640942, filed on Aug. 13, 2003, granted, now 7,203,384. | ||
| Claims priority of provisional application 60/450244, filed on Feb. 24, 2003. | ||
| Prior Publication US 2008/0080791 A1, Apr. 03, 2008 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. G06K 9/22 (2006.01) | ||
| U.S. Cl. 382—314 [382/188; 382/291] | 14 Claims |
| 1. A jotting implement for inferring hand-jotted information on a jotting surface, said jotting implement comprising:
a) a nib for jotting;
b) a means for determining when said nib is jotting on said jotting surface;
c) an optical unit for viewing an environmental landmark and said jotting surface, said optical unit being indexed to said
nib; and
d) a processing unit for receiving optical data from said environmental landmark and said jotting surface from said optical
unit and for determining from said optical data physical coordinates of said nib with respect to said jotting surface.
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