Curtis Instruments, Inc.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
B60L ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL 373
 
  
 
G01R MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES 3156
 
  
 
H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY 3117
 
  
 
G01N INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES 2204
 
  
 
A63F CARD, BOARD, OR ROULETTE GAMES; INDOOR GAMES USING SMALL MOVING PLAYING BODIES; GAMES NOT OTHERWISE PROVIDED FOR 178
 
  
 
B60K ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS; AUXILIARY DRIVES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST, OR FUEL SUPPLY, OF PROPULSION UNITS, IN VEHICLES 192
 
  
 
B66C CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES 130
 
  
 
G05D SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES 183
 
  
 
G06F ELECTRIC DIGITAL DATA PROCESSING 1446
 
  
 
H01M PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY 1153

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
9698453 Adjustable length battery electrolyte probeNov 26, 14Jul 04, 17[H01M, G01R]
9046559 Isolation monitorMay 09, 12Jun 02, 15[G01R, B60L]
8751084 Vehicle component recognition and adjustment for energy efficiencyMay 08, 12Jun 10, 14[G05D, B60L, B66C]
8602140 Motor controller with integrated safety function to eliminate requirement for external contactorApr 02, 12Dec 10, 13[B60K]
8535152 Integrated game function in a personal mobility vehicle, such as a wheelchairJun 24, 10Sep 17, 13[A63F]
7898203 Systems and methods for dynamically compensating motor resistance in electric motorsJul 11, 08Mar 01, 11[G01R]
6622069 Automatic motor adjustment for differentially steered dual electric motor systemMay 07, 02Sep 16, 03[G06F, G05D, B60L]
6611116 Anti-spin control for a separately excited motor drive systemMay 10, 01Aug 26, 03[H02P]
6380716 Condition monitoring of opportunity charged batteriesNov 17, 00Apr 30, 02[H02J]
6362601 Method of battery charge restoration based on estimated battery plate deterioration and/or based on battery state of healthNov 17, 00Mar 26, 02[H02J, G01N]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2013/0018,524 Single Handed Attendant Control for a WheelchairAbandonedJul 11, 12Jan 17, 13[G06F, G05G]
2012/0316,884 Wheelchair System Having Voice Activated Menu Navigation And Auditory FeedbackAbandonedJun 04, 12Dec 13, 12[G10L]
2012/0310,470 WHEELCHAIR SYSTEM HAVING A SHORT RANGE WIRELESS INTERFACE TO AN INTERMEDIARY DEVICE FOR RELAYING DIAGNOSTIC-RELATED AND OPERATIONAL PROGRAM INFORMATION TO AND FROM A REMOTE SITEAbandonedApr 24, 12Dec 06, 12[G06F]
2009/0084,617 Integrated reminder function in a personal mobility vehicle, such as a wheelchairAbandonedOct 01, 07Apr 02, 09[B60K, G06F]
2004/0143,511 Method and apparatus for web-based configuration of instrumentation, and business methods employing sameAbandonedOct 02, 03Jul 22, 04[G06F]
6456043 Method of diagnosing the state of health of a batteryExpiredJul 19, 01Sep 24, 02[G01N, A02J]
6439067 Shaft sensor assembly for angular velocity, torque, and powerExpiredJul 18, 01Aug 27, 02[G01L]
6208245 Engine oil change indicator systemExpiredAug 02, 99Mar 27, 01[B60Q]
6202039 Compact, low-cost semiconductor device for receiving arbitrary input parameters and driving selected display devices, and methodsExpiredNov 04, 97Mar 13, 01[G09G]
5374881 Electric motor controllerExpiredNov 24, 92Dec 20, 94[H02P]
5261025 Method and apparatus for DC motor speed controlExpiredJan 19, 89Nov 09, 93[H02P]
5247253 Eddy current proximity sensing means and method useful for determining throttle positionExpiredNov 09, 90Sep 21, 93[G01B]
5202682 Data encodement and reading method and apparatusExpiredOct 18, 91Apr 13, 93[G08C]
4852104 Solid-state reader device for a cumulative operations measurement systemExpiredJul 10, 87Jul 25, 89[G06F]
4740754 Bidirectional battery state-of-charge monitorExpiredJan 13, 86Apr 26, 88[H02J]
4728923 Steerable wheel direction indicatorExpiredMar 12, 87Mar 01, 88[B60Q]
4724332 Synchronous load lock-out control system for battery powered equipmentExpiredJun 12, 85Feb 09, 88[H02I]
4712195 Solid-state cumulative operations measurement systemExpiredMay 09, 86Dec 08, 87[G11C]
D288791 Battery state-of-charge meterExpiredNov 07, 83Mar 17, 87[]
4626750 Solid state d.c. motor controlExpiredSep 10, 85Dec 02, 86[H02P]

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