Inventor
William Johnston
Inventor
Blacksburg, VA, US
Overview
Patents· 21 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
E21Bprimary
E21BEarth or rock drilling20%
G01KMeasuring temperature16%
G01VGeophysics12%
G02BOptical elements, systems or apparatus12%
G01HMeasurement of mechanical vibrations or ultrasonic, sonic or infrasonic waves6%
G01LMeasuring force, stress, torque, work, mechanical power, mechanical efficiency, or fluid pressure4%
G01NInvestigating or analysing materials by determining their chemical or physical properties4%
H01PWaveguides4%
H05KPrinted circuits4%
Y10TTechnical subjects covered by former us classification4%
PatentTitleYear
11,125,636Quadrature detection for optical MEMS pressure gauge202110,746,016Time division multiplexing of distributed downhole sensing systems202010,690,552DTS performance improvement through variable mode path length averaging202010,677,050Dispersion-shifted optical fibers for downhole sensing202010,545,036Distributed parameter measurements using multiple optical sources202010,494,914Measurement of temperature using combination of rayleigh and raman backscatter interferometry201910,415,375Optical fiber distributed sensors with improved dynamic range201910,208,586Temperature sensing using distributed acoustic sensing201910,161,811Distributed temperature sensor enhancement by stimulated Raman suppression20189,989,425Attenuation correction for distrbuted temperature sensors using antistokes to rayleigh ratio20189,982,531Optical fiber distributed sensors with improved dynamic range20189,797,783'Filter and method and distributed temperature sensor system'20179,670,759'Monitoring fluid flow in a downhole assembly'20179,634,766'Distributed acoustic sensing using low pulse repetition rates'20179,404,831'Arrayed wave division multiplex to extend range of IOFDR fiber bragg sensing system'20169,110,251'Processing images of fiber optic connector ends'20158,736,397'Ku-band coaxial to microstrip mixed dielectric PCB interface with surface mount diplexer'20148,471,649'Ku-band diplexer'20135,717,928'System and a method for obtaining a mask programmable device using a logic description and a field programmable device implementing the logic description'19985,273,484'Food-processing apparatus'19935,267,399'Implement for simultaneous skin chilling and chilled gel application'1993Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1998Based in San Jose, CA, US· patent location history
2013–2014Based in Poway, CA, US· patent location history
2015Based in Baltimore, MD, US· patent location history
2016–2019Patents assigned to JOHNSTON WILLIAM (8)· patent assignee history
2016–2020Patents assigned to MITCHELL IAN (6)· patent assignee history
2016–2017Patents assigned to BAKER HUGHES INC (4)· patent assignee history
2016–2019Based in Blacksburg, VA, US· patent location history
2017–2021Patents assigned to JOHNSTON WILLIAM ALBERT (7)· patent assignee history
2017–2021Based in Houston, TX, US· patent location history
2018–2021Patents assigned to BAKER HUGHES A GE CO LLC (10)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| BAKER HUGHES A GE CO LLC | 10 | 2018–2021 |
| JOHNSTON WILLIAMself | 8 | 2016–2019 |
| JOHNSTON WILLIAM ALBERTself | 7 | 2017–2021 |
| MITCHELL IAN | 6 | 2016–2020 |
| BAKER HUGHES INC | 4 | 2016–2017 |
Locations
| Location | Patents | Span |
|---|---|---|
| Blacksburg, Virginia, US | 8 | 2016–2019 |
| Houston, Texas, US | 7 | 2017–2021 |
| Poway, California, US | 2 | 2013–2014 |
| Baltimore, Maryland, US | 1 | 2015 |
| San Jose, California, US | 1 | 1998 |