US Patent No: 4,883,926

Number of patents in Portfolio can not be more than 2000

Stylus switch

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Abstract

A stylus contains a switch which makes contact in response to slight radial motion of the stylus tip relative to the stylus housing. Means for emitting radiation operates in response to switch closure, thereby emitting a beam of radiation out the tip. The stylus includes an internal power source, such as one or more batteries, for operation of the means for emitting radiation. When such internal power source is capable of being recharged, the stylus may include means for external connection to the recharging supply. In another embodiment, the stylus is capable of emitting more than one type of radiation which are distinguishable, such as by wavelength, modulation type, or other convenient means. In this manner, the stylus can be controlled by the user to emit different signals, which may be interpreted by a receiving device, for example, as different colors, or as a write signal versus an erase signal. In one embodiment, such an erase signal is emitted from the opposite end of the stylus as the write signal.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
HEWLETT-PACKARD COMPANYPALO ALTO, CA2942

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Baldwin, Richard R Saratoga, CA 9 237

Cited Art

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Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
CANDLEDRAGON, INC. (3)
7,257,255 Capturing hand motion 9 2001
7,268,774 Tracking motion of a writing instrument 21 2003
7,755,026 Generating signals representative of sensed light that is associated with writing being done by a user 4 2006
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (3)
5,138,118 Pulsed pen for use with a digitizer tablet 44 1991
5,355,100 Battery powered magnetic pen with time out to prevent accidental battery discharge 6 1993
5,912,659 Graphics display pointer with integrated selection 10 1997
 
RICOH COMPANY, LTD. (3)
6,081,261 Manual entry interactive paper and electronic document handling and processing system 233 1995
6,181,329 Method and apparatus for tracking a hand-held writing instrument with multiple sensors that are calibrated by placing the writing instrument in predetermined positions with respect to the writing surface 79 1997
6,492,981 Calibration of a system for tracking a writing instrument with multiple sensors 67 2000
 
TV INTERACTIVE DATA CORPORATION (3)
5,650,608 Method and apparatus for generating ratiometric control signals 22 1994
5,818,037 Controller using a flexible element to vary light transferred to a photosensitive element 16 1996
5,973,313 Method and apparatus for generating ratiometric control signals 5 1996
 
CANON KABUSHIKI KAISHA (2)
5,177,472 Vibrating input pen used for a coordinate input apparatus 17 1990
7,456,824 Coordinate input apparatus with region recognition 1 2004
 
DIGITAL INK, INC. (2)
6,577,299 Electronic portable pen apparatus and method 87 1999
7,773,076 Electronic pen holding 2 2006
 
LG ELECTRONICS INC. (2)
5,251,123 High resolution system for sensing spatial coordinates 10 1991
6,175,773 High resolution system for sensing spatial coordinates 3 1998
 
PRO ETON CORPORATION (2)
D465805 Touch-sensitive screen stylus 16 2002
D465806 Touch-sensitive screen stylus 12 2002
 
A PLACE OF BUSINESS IN TOKYO, JAPAN AND RICOH CORPORATION (1)
6,201,903 Method and apparatus for pen-based faxing 83 1997
 
A.T.X. INTERNATIONAL, INC. (1)
5,627,348 Electronic stylus with writing feel 26 1995
 
ALPS ELECTRIC CO., LTD. (1)
5,999,170 Input pen 8 1997
 
AUTOMATED DECISIONS, INC. (1)
5,248,855 Gravity sensing digitizing stylus 16 1992
 
BROADCOM CORPORATION (1)
6,266,685 Hand-held data collection system with stylus input 188 1998
 
CIRQUE CORPORATION (1)
5,914,708 Computer input stylus method and apparatus 131 1996
 
EINSTRUCTION GTCO HOLDINGS, LLC (1)
5,384,688 Three-dimensional circuits for digitizer and pen-based computer system pen cursors 12 1993
 
HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. (1)
7,426,643 Input device feature 3 2004
 
INTEL CORPORATION (1)
6,188,392 Electronic pen device 75 1997
 
INTELLECTUAL ASSET GROUP, LLC (1)
5,847,694 Apparatus for generating a signal indicative of the position of a movable element in the apparatus 21 1994
 
KABUSHIKIKAISHA WACOM (1)
6,441,362 Stylus for optical digitizer 27 1999
 
LSI CORPORATION (1)
6,730,862 Erase feature in pen-based computing 5 1995
 
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. (1)
5,414,228 Handwritten character input device 11 1993
 
POLYVISION CORPORATION (1)
8,243,028 Eraser assemblies and methods of manufacturing same 0 2008
 
SAMSUNG DISPLAY DEVICES CO., LTD. (1)
5,818,431 Input/output signal transmitting stylus 11 1995
 
SIEMENS AKTIENGESELLSCHAFT (1)
5,726,685 Input unit for a computer 19 1995
 
SILVERBROOK RESEARCH PTY LTD (1)
7,982,725 Sensing device with inductive charging 0 2004
 
TEK INDUSTRIES, INC. (1)
5,321,584 Battery and holder assembly for use with a battery operated touch pen 18 1993
 
TV INTERACTIVE DATE CORPORATION (1)
5,459,489 Hand held electronic remote control device 73 1993
 
WACOM CO., LTD. (1)
6,064,374 Cordless electronic pen with cartridge 16 1997
 
OTHER [CHECK PATENT PROFILE FOR ASSIGNMENT INFORMATION] (1)
5,673,996 Pen with led indicator 26 1996