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US Patent 5428805 - Method and apparatus for recognizing and performing handwritten calculations

US Patent Issued on June 27, 1995
Estimated Patent Expiration Date: Icon_subject December 22, 2012Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
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Abstract

A pen-based calculator recognizes handwritten input. The calculator comprises a display simulating a sheet of paper, and a stylus simulating a pen. The user writes a calculation on the calculator as if it were a piece of scratch paper. The calculator uses handwriting recognition to identify the various elements of the calculation, performs the calculation, and then displays the result at an appropriate location.

Other References

  • "Introducing Sharpened Tools for PenPoint™," Sharpened Software, Inc., 1993 publication
  • "Your World According to Newton," by Marcelle M. Soviero, Popular Science, Sep. 1992
  • "So Exactly What Can You Do With This Newton Thing?" Apple Creative Services in collaberation with the Newton Group, 1992
  • "The Next Wave of Portable Computing PC Labs Tests the First Eight Pen PCs," PC Magazine, Nov. 10, 1992, vol. 11, No. 19, pp. 175-178, 182-186, 191-203
  • "486 Pen PC," Microslate, 1992 publication
  • "Nope. It Wasn't Steroids!" Microslate, publication
  • "PenPoint™," GO Corporation, 1992 publication
  • "All-Terrain Supertablet™," Tusk Inc., Jul. 1992 publication
  • "Programming Windows™ for Pen Computering Using Visual Basic™," Synaptix, Inc., 1992 publication
  • "Microsoft.RTM. Windows™ for PEN Computing Resource Guide: Pens," Microsoft Consulting Services publication
  • "Stroke of the Hand," Concept Technologies, Inc., 1992 publication
  • "SuperScript II Display Tablet," SuperScript Inc. publication
  • "FieldNotes, GIS for Laptop and Pentop Computers!," PenMetrics, Inc., 1992 publication
  • "Sales Automation solutions: General Programming, Inc. uses Infolio™ to premiere Sales-Manager™ tool," PI Systems Corporation publication
  • "Slate PenApps™ Application is the complete development environment for pen-based applications," Slate Corporation, 1992 publication
  • "The Magazine Of Pen-Based Computing," pen, PenWorld Inc., Issue 9, Sep./Oct. 1992
  • "de-ja vu," Slate Corporation publication
  • "Slate At-Hand™," 1992 Slate Corporation publication
  • "Perspective," 1992 Pensoft Corporation publication
  • "Desktop Pen Computing," FTG Data Systems publication
  • "Kurta High Performance Pen System For Pen-Based Computers," 1992 Kurta publication
  • "PenMan™ Wireless Pen And Digitizer," 1992 Logitech publication
  • "The Dauphin Difference," 1992 Dauphin Technology, Inc. publication
  • "Wacom Application Report 6 For Pen Computer Manufacturers and Software Developers," Wacom Technology Corporation publication
  • "The Newest Advancement in Computers . . . The Pen!," Greycat, Inc. publication
  • "Numero! The financial work processor for pen computers," 1992 PenMagic Software Inc. publiczation
  • "Numbers to go: PenCell Portable Spreadsheet," PenWare, Inc. publication. 1992
  • "AMS Donates Pen Computing Exhibit to The Computer Museum," Mobile Systems News, American Management Systems, Inc. publication
  • "Exciting Pen Computer Products," Ink Development Corporation publication. 199

Inventor

Application

No. 994950 filed on 12/22/1992

US Classes:

708/141, Including specific nonkeyboard-type information entry345/173, Touch panel345/179, Stylus715/541Handwritten textual input

Field of Search

345/173, Touch panel345/179Stylus

Examiners

Primary: Bowler, Alyssa H.
Assistant: Pan, Daniel H.

Attorney, Agent or Firm

US Patent References

4141073, Keyless electronic calculating pen
Issued on: 02/20/1979
Inventor: Tan4151596, Calculator interface
Issued on: 04/24/1979
Inventor: Howells4578811, Key-in device
Issued on: 03/25/1986
Inventor: Inagaki5226091, Method and apparatus for capturing information in drawing or writing
Issued on: 07/06/1993
Inventor: Howell, et al.5231698, Script/binary-encoded-character processing method and system
Issued on: 07/27/1993
Inventor: Forcier5233547Electronic checking account apparatus and method having a digitizer to receive information as a check is being written
Issued on: 08/03/1993
Inventor: Kapp, et al.

International Classes

G06F 003/033
G06F 003/14
G06F 009/06

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