Assignee
JOHNSON DAVID RANDAL
US·3 granted patents·49 citations·filing 2009–2010
Technology mixG08G3
Top patents by PatentIndex Score
3 records- 0187US8823548B2Control of traffic signal phasesJOHNSON DAVID RANDAL·Filed 2010·Granted Sep 2, 2014·22 cites·21 claims
- 0284US8610596B2Monitoring and diagnostics of traffic signal preemption controllersJOHNSON DAVID RANDAL·Filed 2010·Granted Dec 17, 2013·15 cites·20 claims
- 0375US8325062B2Centralized management of preemption control of traffic signalsJOHNSON DAVID RANDAL·Filed 2009·Granted Dec 4, 2012·12 cites·21 claims
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