Craelius AB

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
D296107 Cutting segment for a cutting diskExpiredDec 05, 85Jun 07, 88[]
4643262 Pressurized medium actuated gripping deviceExpiredMar 10, 86Feb 17, 87[B23Q]
4637477 Device in rock drilling machinesExpiredJan 13, 85Jan 20, 87[B23Q]
4458764 Device in rock or earth drilling apparatus for rotary drillingExpiredMay 24, 82Jul 10, 84[E21C]
4456077 Device for reciprocating motion of a rotating drilling body of a drilling machineExpiredApr 30, 82Jun 26, 84[B23Q]
4452321 Device in core barrelsExpiredOct 05, 81Jun 05, 84[E21B]
4431225 Releasing device in core barrel grapplersExpiredOct 05, 81Feb 14, 84[E21B]

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