NUMA TOOL COMPANY

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
B25D PERCUSSIVE TOOLS 119
 
  
 
E21C MINING OR QUARRYING121

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
7422074 Delayed compression sleeve hammerMay 19, 06Sep 09, 08[B25D]
6883618 Variable timing for front chamber of pneumatic hammerJun 15, 04Apr 26, 05[E21C]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2005/0072,602 Integral bit retention systemAbandonedMar 05, 03Apr 07, 05[E21B]
6698537 Bit retention systemExpiredDec 05, 01Mar 02, 04[E21B]
6070678 Bit retention systemExpiredMay 01, 98Jun 06, 00[E21B]
6021856 Bit retention systemExpiredMay 29, 98Feb 08, 00[E21B]
5992537 Back end connection in a downhole drillExpiredMay 29, 98Nov 30, 99[E21B]
5984021 Porting system for back chamber of pneumatic hammerExpiredJan 27, 98Nov 16, 99[B23Q]
5205363 Porting system for pneumatic impact hammerExpiredMay 16, 91Apr 27, 93[B23Q]
4962822 Downhole drill bit and bit couplingExpiredDec 15, 89Oct 16, 90[E21B]
4919221 Impact drill bit assembly and replaceable parts thereofExpiredApr 06, 89Apr 24, 90[E21B]

Top Inventors for This Owner

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