WOOLSLAYER COMPANIES, INC.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
E21B EARTH OR ROCK DRILLING 789
 
  
 
E04H BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL 426
 
  
 
B66C CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES 328
 
  
 
B62D MOTOR VEHICLES; TRAILERS 190
 
  
 
F16M FRAMES, CASINGS, OR BEDS, OF ENGINES OR OTHER MACHINES OR APPARATUS, NOT SPECIFIC TO AN ENGINE, MACHINE, OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS OR SUPPORTS134
 
  
 
G01C MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY 1104

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
9580977 Blowout preventer transport and handling systemSep 11, 13Feb 28, 17[E21B]
9488023 Blowout preventer storage, transport and lift skid assemblyMay 21, 15Nov 08, 16[F16M, E21B]
9415819 Rig movement and rotation assemblyNov 20, 14Aug 16, 16[B62D]
9016004 Apparatus for and method of folding a mast or derrickMar 15, 13Apr 28, 15[E21B, E04H]
8720128 Mast assembly with cylinder nested in substructureOct 01, 12May 13, 14[B66C, E04H]
8381480 Dual offset derrickJun 15, 11Feb 26, 13[E04H]
8353132 Method and apparatus for erection and disassembly of a sectional mast assemblyFeb 16, 11Jan 15, 13[E04H]
8250826 Hingeable derrickApr 14, 10Aug 28, 12[E04H]
8112946 Articulating mastNov 23, 09Feb 14, 12[B66C]
6821071 Automated pipe racking process and apparatusSep 25, 02Nov 23, 04[E21B]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2010/0150,661 OPEN FACE DERRICKAbandonedDec 12, 08Jun 17, 10[E02B]
6910679 Variable controlled guide device for wireline spoolerExpiredJun 02, 03Jun 28, 05[B66F]
4834604 Pipe moving apparatus and methodExpiredOct 19, 87May 30, 89[E21B]
4725179 Automated pipe racking apparatusExpiredNov 03, 86Feb 16, 88[E21B]
4390162 Infinitely variable crown block positioningExpiredMay 20, 81Jun 28, 83[B66D]

Top Inventors for This Owner

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