DOOWON TECHNICAL COLLEGE

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
F04B POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS 854
 
  
 
F03C POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS 321
 
  
 
F04C ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS 344
 
  
 
F01B MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES 225
 
  
 
F01C ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES 227
 
  
 
F16K VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING271
 
  
 
B23P OTHER WORKING OF METAL; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS 155
 
  
 
H01R ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS 1132

Top Patents (by citation)

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Recent Publications

Publication # Title Filing Date Pub Date Intl Class
2018/0030,971 VARIABLE-CAPACITY SWASHPLATE-TYPE COMPRESSORFeb 16, 16Feb 01, 18[F04B]

Recent Patents

Patent # Title Filing Date Issue Date Intl Class
9551334 Variable capacity compressor having a control valve with channelsMay 23, 12Jan 24, 17[B23P, F04B]
9328721 Variable displacement swash plate type compressorMar 13, 13May 03, 16[F04B]
9022061 Displacement control valve for variable displacement compressorSep 29, 09May 05, 15[F16K, F04B]
8858197 Compressor with sensor and valve plate arrangementJul 31, 09Oct 14, 14[F04B, F04C, F01C]
8671976 Exhaust check valve of swash plate compressorJul 31, 09Mar 18, 14[F16K, F04B]
8550797 Scroll compressor with improved back pressure force control functionJul 31, 09Oct 08, 13[F04C, F03C]
8517695 Variable displacement swash plate type compressorNov 13, 08Aug 27, 13[F04B]
8485794 Reciprocating compressor with rotary valveJun 09, 09Jul 16, 13[F01B]
8485803 Scroll compressor comprising oil separating driving shaftFeb 27, 09Jul 16, 13[F04C, F03C, F01C]
8459962 Variable displacement swash plate type compressorOct 17, 08Jun 11, 13[F04B]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2012/0100,012 METHOD FOR CONTROLLING ELECTRIC COMPRESSORAbandonedJun 16, 10Apr 26, 12[F04B]
2011/0196,573 METHOD OF CONTROLLING INVERTER-INTEGRATED ELECTRIC COMPRESSOR FOR VEHICULAR AIR CONDITIONING SYSTEMAbandonedJul 31, 09Aug 11, 11[B60H]
2011/0146,215 OIL SEPARATORAbandonedJun 22, 09Jun 23, 11[B01D]
2011/0008,197 INVERTER TYPE SCROLL COMPRESSORAbandonedFeb 27, 09Jan 13, 11[F01C]
2010/0269,686 VARIABLE DISPLACEMENT COMPRESSOR HAVING REFRIGERANT FLOWING FUNCTION IN DRIVING SHAFTAbandonedNov 13, 08Oct 28, 10[F04B]
2010/0272,583 VALVE PLATE OF RECIPROCATING COMPRESSORAbandonedDec 24, 08Oct 28, 10[F04B]
2010/0135,828 VARIABLE DISPLACEMENT SWASH PLATE TYPE COMPRESSORAbandonedApr 26, 07Jun 03, 10[F04B]
2010/0092,311 DISPLACEMENT CONTROL VALVE FOR VARIABLE DISPLACEMENT COMPRESSORAbandonedOct 08, 09Apr 15, 10[F04B]
2009/0317,276 SCROLL COMPRESSOR HAVING ROTATION PREVENTION MECHANISMAbandonedDec 14, 06Dec 24, 09[F04C]

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