Patent US5073770A successfully refreshed from Google Patents.
US5073770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brightpen/pad II
Assignee: Individual
•
Filing: 1990-08-03
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Granted: 1991-12-17
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Expires: 2010-08-03
Abstract
Abstract A scanning and digitizing device where the same photodetectors are used in a scanning mode and in a digitizing mode. In the scanning mode graphic information is scanned. In the digitizing mode coordinate positions of a stylus is determined. The photodetectors are used in the imaging portion of this device which imaging portion is a rangefinder in the digitizing mode.
Inventors
- 👤 Hugh G. Lowbner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:38
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/01; G06F3/03; G06F3/041; G06F3/042; G06F3/0428
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
67 words
An apparatus for digitizing graphic information on sheets of paper comprising photodetectors and imaging systems capable of imaging graphic information on said sheets of paper, and which said photodetectors are also used to digitize the coordinate position of a light emitting stylus or light absorbing stylus by means of converting analog signals from said photodetectors to digital signals suitable for input into a computer or the like.
Claim 2
Independent Claim
67 words
An apparatus for digitizing graphic information on sheets of paper comprising photodetectors and imaging systems capable of imaging graphic information on said sheets of paper, and which said photodetectors are also used to digitize the coordinate position of a light emitting stylus or light absorbing stylus by means of converting analog signals from said photodetectors to digital signals suitable for input into a computer or the like.
Claim 3
Dependent Claim
68 words
An apparatus according to claim 1 in which said photodetectors are capable of digitizing the coordinate position of the stylus by means of systems capable of forming images of the stylus on the said photodetectors and the means of imaging graphic information on said sheets of paper is by means of imaging successive lines of information on said sheets of paper by means of transporting said sheets paper.
Claim 4
Dependent Claim
28 words
An apparatus according to claim 2 in which the means for forming said images of stylus indicating X, Y, coordinate position of said stylus consists of a rangefinder.
Claim 5
Dependent Claim
33 words
An apparatus according to claim 3 consists of means for acquiring separate views of said stylus, means for forming images of said separate views, and means for projecting said images upon said photodetectors.
Claim 6
Dependent Claim
16 words
An apparatus according to claim 4 in which means for acquiring separate views consists of mirrors.
Claim 7
Dependent Claim
15 words
An apparatus according to claim 4 in which means for forming said images are slits.
Claim 8
Dependent Claim
15 words
An apparatus according to claim 4 in which means for forming said images are pinholes.
Claim 9
Dependent Claim
16 words
An apparatus according to claim 1 in which the photodetector consists of a CCD detector array.
Claim 10
Dependent Claim
15 words
An apparatus according to claim 1 in which the photodetector consists of a vidicon tube.
Claim 11
Dependent Claim
17 words
An apparatus according to claim 1 in which the photodetector consists of an array of photoelectric cells.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-12-16 | 1995-06-17 | 1995-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-16 | 1999-06-17 | 1999-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-16 | 2003-06-17 | 2003-12-17 | $7700.00 | Window Closed / Lapsed |