Inventor
Robert A. Sprague
Inventor
Saratoga, CA, US
Overview
Patents· 128 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G02Fprimary
G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein31%
G02BOptical elements, systems or apparatus13%
G09GArrangements or circuits for control of indicating devices using static means to present variable information9%
H04NPictorial communication, e.g. television7%
B41JTypewriters4%
G06KGraphical data reading4%
G06FElectric digital data processing3%
H01LSemiconductor devices3%
G09FDisplaying2%
G03BApparatus or arrangements for taking photographs or for projecting or viewing them2%
PatentTitleYear
11,079,630Wide lateral angle frontlight for use with reflective displays202111,009,762Borderless display with curved edges202110,884,260Dark line compensation in polarized three-dimensional viewing202110,802,195High contrast frontlight structures for reflective displays202010,627,694Hybrid displays including electrophoretic displays and light emitting diodes202010,578,943Additive particles for improving optical performance of an electrophoretic display202010,557,221Covers for electronic display elements with improved visibility202010,535,312Driving methods and circuit for bi-stable displays202010,288,975Electrophoretic dispersion including charged pigment particles, uncharged additive nanoparticles, and uncharged neutral density particles201910,288,973Borderless display with thin profile201910,288,797Structural alignment features for light emitting diode arrays201910,288,974Borderless display with curved edges201910,274,804Thin border displays201910,241,377Self-healing flexible electrophoretic displays201910,228,604Display stack for borderless electronic displays201910,185,200Thin border displays201910,002,575Driving methods and circuit for bi-stable displays20189,977,252Dark line compensation in polarized three-dimensional viewing20189,971,151Mountable clear displays and projection systems20189,835,926Electrophoretic dispersion20179,778,473'Dark line compensation in polarized three-dimensional viewing'20179,778,537'Additive particles for improving optical performance of an electrophoretic display'20179,568,800'Thin border displays'20179,507,162'Display component assembly'20169,460,666'Driving methods and waveforms for electrophoretic displays'20169,423,666'Additive for improving optical performance of an electrophoretic display'20169,373,289'Driving methods and circuit for bi-stable displays'20169,291,872'Electrophoretic display design'20169,256,064'Angled orientation of sub-pixels in an electrowetting display'20169,171,508'Driving bistable displays'20159,140,952'Electrophoretic display with enhanced contrast'20159,052,564'Electrophoretic dispersion'20159,030,374'Composite display modules'20159,019,318'Driving methods for electrophoretic displays employing grey level waveforms'20159,013,783'Color electrophoretic display'20158,976,444'Color display devices'20158,917,439'Shutter mode for color display devices'20148,902,491'Additive for improving optical performance of an electrophoretic display'20148,810,899'Color display devices'20148,810,525'Electronic information displays'20148,797,633'Display device assembly and manufacture thereof'20148,797,258'Highlight color display architecture using enhanced dark state'20148,786,935'Color electrophoretic display'20148,743,077'Front light system for reflective displays'20148,730,153'Driving bistable displays'20148,714,780'Display devices with grooved luminance enhancement film'20148,670,174'Electrophoretic display fluid'20148,649,084'Color display devices'20148,605,354'Color display devices'20138,576,164'Spatially combined waveforms for electrophoretic displays'20138,558,855'Driving methods for electrophoretic displays'20138,514,168'Electrophoretic display with thermal control'20138,503,063'Multicolor display architecture using enhanced dark state'20138,462,102'Driving methods for bistable displays'20138,456,589'Display device assembly'20138,422,116'Color display devices'20138,274,472'Driving methods for bistable displays'20128,243,013'Driving bistable displays'20128,238,021'Display devices having micro-reflectors and color filters'20128,237,892'Display device with a brightness enhancement structure'20128,169,690'Color display devices'20128,154,790'Electrophoretic display structures'20128,122,880'Inhaler that uses focused acoustic waves to deliver a pharmaceutical product'20128,120,836'Luminance enhancement structure for reflective display devices'20128,072,675'Color display devices'20117,982,941'Color display devices'20117,830,592'Display devices having micro-reflectors'20107,671,834'Electric writable media'20107,479,942'Stylus writing architectures for erasable paper'20097,375,634'Direction signage system'20087,121,275'Method of using focused acoustic waves to deliver a pharmaceutical product'20066,795,228'Display material for electric paper and applications thereof'20046,514,704'Quality control mechanism and process for a biofluid multi-ejector system'20036,428,159'Apparatus for achieving high quality aqueous ink-jet printing on plain paper at high print speeds'20026,428,160'Method for achieving high quality aqueous ink-jet printing on plain paper at high print speeds'20026,396,205'Nonspecular visual display and method'20026,222,513'Charge retention islands for electric paper and applications thereof'20016,160,606'Optical equivalents of fiber optic face plates using irradiation sensitive glass'20005,934,140'Paper property sensing system'19995,744,732'Sheet materials transport system'19985,714,697'Sheet materials mass measuring system'19985,634,636'Flexible object handling system using feedback controlled air jets'19975,612,791'Bound document imager with air jet page turning system'19975,550,656'Full color display with plural two-dimensional planar arrays of lenslets'19965,504,597'Full color display with gradient index lens array disposed between phosphor emitters and liquid crystal display'19965,504,598'Large screen full color display with plural adjacent display panels and enlarging graded index lens array'19965,442,467'Enhanced off-axis viewing performance and luminous efficiency of a liquid crystal display employing fiberoptic faceplate elements'19955,315,418'Two path liquid crystal light valve color display with light coupling lens array disposed along the red-green light path'19945,264,880'Method and apparatus for projecting a color image'19935,138,340'Temperature controlled light source for interlaced printer'19924,730,331'Superluminescent LED source'19884,728,166'Branching electro-optic waveguides'19884,718,752'Interpixel null suppression for polarized optical image bars'19884,689,291'Pedestal-type microlens fabrication process'19874,663,738'High density block oriented solid state optical memories'19874,656,641'Laser cavity optical system for stabilizing the beam from a phase locked multi-emitter broad emitter laser'19874,638,334'Electro-optic line printer with super luminescent LED source'19874,633,445'Eraseable solid state optical memories'19864,622,079'Method for the dispersion of hard alpha defects in ingots of titanium or titanium alloy and ingots produced thereby'19864,560,994'Two dimensional electro-optic modulator for printing'19854,557,563'Two dimensional electro-optic modulator for optical processing'19854,538,883'Conformable electrodes for proximity coupled electro-optic devices'19854,530,574'Beam collimation and focusing of multi-emitter or broad emitter lasers'19854,517,667'Direct read after write optical disk system'19854,482,215'Mechanical interface for proximity coupled electro-optic devices'19844,480,899'Two dimensional electro-optic modulator and applications therefor'19844,478,483'Variable length electro-optic waveguides and applications therefor'19844,450,459'Differential encoding for fringe field responsive electro-optic line printers'19844,438,461'Integrated input/output scanner for electronic document processing'19844,437,106'Method and means for reducing illumination nulls in electro-optic line printers'19844,428,647'Multi-beam optical system using lens array'19844,421,387'Extended thin film light modulator/scanner'19834,415,915'Multilayer interleaved electrodes for multigate light valves'19834,413,270'Multigate light valve for electro-optic line printers having non-telecentric imaging systems'19834,409,479'Optical cursor control device'19834,389,659'Electro-optic line printer'19834,386,827'Electrooptical scanning device'19834,380,373'Conformable proximity coupled electro-optic devices'19834,376,568'Thick film line modulator'19834,370,029'Dielectric interface for proximity coupled electro-optic devices'19834,370,030'Extended resolution light deflector using surface acoustic waves'19834,369,457'Reverse polarity differential encoding for fringe field responsive electro-optic line printers'19834,367,925'Integrated electronics for proximity coupled electro-optic devices'19834,346,965'Light modulator/deflector using acoustic surface waves'19824,281,904'TIR Electro-optic modulator with individually addressed electrodes'19814,204,230'High resolution input scanner using a two dimensional detector array'19804,107,701'Acousto-optic snapshot recorder'19783,988,068'Method and apparatus for detecting cosmetic defects in opthalmic lenses'1976Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1976–1978Based in Chelmsford, MA, US· patent location history
1980–2010Patents assigned to XEROX CORP (58)· patent assignee history
1980–2021Based in Saratoga, CA, US· patent location history
1986Based in Danvers, MA, US· patent location history
2010–2016Patents assigned to SIPIX IMAGING INC (31)· patent assignee history
2011–2015Patents assigned to SPRAGUE ROBERT A (24)· patent assignee history
2014–2020Patents assigned to E INK CALIFORNIA LLC (21)· patent assignee history
2016–2021Patents assigned to AMAZON TECH INC (19)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| XEROX CORP | 58 | 1980–2010 |
| SIPIX IMAGING INC | 31 | 2010–2016 |
| SPRAGUE ROBERT Aself | 24 | 2011–2015 |
| E INK CALIFORNIA LLC | 21 | 2014–2020 |
| AMAZON TECH INC | 19 | 2016–2021 |
Locations
| Location | Patents | Span |
|---|---|---|
| Saratoga, California, US | 125 | 1980–2021 |
| Chelmsford, Massachusetts, US | 2 | 1976–1978 |
| Danvers, Massachusetts, US | 1 | 1986 |