MCDONNELL DOUGLAS HELICOPTER COMPANY

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
B64C AEROPLANES; HELICOPTERS 2351
 
  
 
B32B LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM3154
 
  
 
F01D NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES 362
 
  
 
F01B MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES 225
 
  
 
F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR 243
 
  
 
F16H GEARING298
 
  
 
A47C CHAIRS 152
 
  
 
B23F MAKING GEARS OR TOOTHED RACKS 115
 
  
 
B29C SHAPING OR JOINING OF PLASTICS; SHAPING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; AFTER- TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING 1124
 
  
 
B61L GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC 125

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
6821090 Gust alleviation/flutter suppression deviceJan 06, 99Nov 23, 04[B64C]
6543719 Oscillating air jets for implementing blade variable twist, enhancing engine and blade efficiency, and reducing drag, vibration, download and ir signatureNov 24, 98Apr 08, 03[B64C]
6484214 Method for distributed object communications based on dynamically acquired and assembled software componentsMar 05, 98Nov 19, 02[G06F]
6291071 Bonded composite structure and its fabricationDec 30, 99Sep 18, 01[B32B]
6234751 Oscillating air jets for reducing HSI noiseNov 24, 98May 22, 01[B64C]
6217983 R-foam and method of manufacturing sameMar 25, 98Apr 17, 01[B32B]
6193464 Active brake control for rotor/wing aircraftDec 02, 98Feb 27, 01[B63H]
6170779 Rotor pitch lock for rotary/wing aircraftDec 02, 98Jan 09, 01[B64C]
6161799 Rotor blade lock for rotary/wing aircraftDec 02, 98Dec 19, 00[B64C]
6135713 Helicopter rotor blade flap actuator government interestJan 19, 99Oct 24, 00[B64C]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6406783 Bulk absorber and process for manufacturing sameExpiredOct 19, 00Jun 18, 02[B32B]
6375779 Method for making structures having low radar reflectivityExpiredOct 05, 99Apr 23, 02[B32B]
6350513 Low density structures having radar absorbing characteristicsExpiredOct 08, 97Feb 26, 02[B32B]
6056846 Bonded composite structure and its fabricationExpiredJul 25, 96May 02, 00[B32B]
5951252 Helicopter flap lock assemblyExpiredSep 12, 97Sep 14, 99[B64C]
5860810 Automated instructional system for performing mechanical proceduresExpiredApr 14, 95Jan 19, 99[G09B]
5799901 Rotor blade swashplate-axis rotation and gyroscopic moments compensatorExpiredApr 29, 97Sep 01, 98[B63H, B64C]
5791875 Tip vortex reduction systemExpiredSep 10, 96Aug 11, 98[F04D]
5788181 Thermostatic metal actuator for nozzle actuationExpiredOct 16, 95Aug 04, 98[B64C]
5731056 Rigid structure attachment using hook and loop fastenersExpiredJun 11, 96Mar 24, 98[B32B]
5494180 Hybrid resistance cards and methods for manufacturing sameExpiredSep 26, 94Feb 27, 96[H01C]
5074169 Braided shield removalExpiredAug 14, 90Dec 24, 91[H02G]
5029776 Variable explosive source for an ejector systemExpiredMar 05, 90Jul 09, 91[B64D]
4774762 Hand-held automatic power crimperExpiredApr 10, 87Oct 04, 88[B23P, H01R]
4769723 Multiplexed bus data encoder and decoder for facilitating data recordingExpiredDec 30, 85Sep 06, 88[G11B]
4753003 Bandoleer of contact carriers for use in power crimping toolExpiredMay 21, 87Jun 28, 88[B65D]
4695227 All composite, constant speed universal joint for use in a shaft driven tiltable main rotor for a helicopterExpiredFeb 27, 85Sep 22, 87[B64C]
4650401 Flat strap cruciform flexure for helicopter rotor systemsExpiredApr 07, 83Mar 17, 87[B64C]
4632337 Helicopter rotor transmission systemsExpiredDec 02, 83Dec 30, 86[B64C]
4609165 Helicopter auxiliary energy systemExpiredApr 25, 83Sep 02, 86[B64C]

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