Inventor
SPRAGUE ROBERT
US26 patents
⚠️ This page may combine multiple inventors who share the name “SPRAGUE ROBERT”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
MATERION CORP
11 patentsUS9989684B2Jun 5, 2018
Near infrared optical interference filters with improved transmission
MATERION CORP10 citations84
US10502880B2Dec 10, 2019
Method of fabricating anisotropic optical interference filter
MATERION CORP1 citations73
US9927369B2Mar 27, 2018
Automated defect detection and mapping for optical filters
MATERION CORP2 citations73
US9804310B2Oct 31, 2017
Method of fabricating anisotropic optical interference filter
MATERION CORP2 citations73
US10437042B2Oct 8, 2019
Enhancement of output of optically pumped phosphor by use of surface nanostructures
MATERION CORP4 citations72
US11372144B2Jun 28, 2022
Near infrared optical interference filters with improved transmission
MATERION CORP3 citations70
US12000033B2Jun 4, 2024
Method of fabricating anisotropic optical interference filter
MATERION CORP0 citations62
US11474422B2Oct 18, 2022
Reflective color correction for phosphor illumination systems
MATERION CORP0 citations62
US11365471B2Jun 21, 2022
Method of fabricating anisotropic optical interference filter
MATERION CORP0 citations62
US10871644B2Dec 22, 2020
Enhancement of output of optically pumped phosphor by use of surface nanostructures
MATERION CORP1 citations62
US12422605B2Sep 23, 2025
Near infrared optical interference filters with improved transmission
MATERION CORP0 citations60
SPRAGUE ROBERT
8 patentsUS8730153B2May 20, 2014
Driving bistable displays
SPRAGUE ROBERT108 citations98
US8243013B1Aug 14, 2012
Driving bistable displays
SPRAGUE ROBERT190 citations98
US9460666B2Oct 4, 2016
Driving methods and waveforms for electrophoretic displays
SPRAGUE ROBERT108 citations97
US9373289B2Jun 21, 2016
Driving methods and circuit for bi-stable displays
SPRAGUE ROBERT109 citations97
US8786935B2Jul 22, 2014
Color electrophoretic display
SPRAGUE ROBERT123 citations97
US4768959ASep 6, 1988
Method of teaching and transcribing of language through the use of a periodic code of language elements
SPRAGUE ROBERT27 citations90
US4650423AMar 17, 1987
Method of teaching and transcribing of language through the use of a periodic code of language elements
SPRAGUE ROBERT37 citations90
US4795349AJan 3, 1989
Coded font keyboard apparatus
SPRAGUE ROBERT15 citations71