Description
Class E21B : EARTH OR ROCK DRILLING
Subclass 1/36: Percussion drilling (drives used in the borehole E21B 4/00) Tool-carrier piston type, i.e. in which the tool is connected to an impulse member
E21B 1/36
Sub-Class
Stats
- 2 US PATENTS IN FORCE
- 0 US APPLICATIONS PENDING
- 1 Total Patent Owners
- 144 TOTAL INVENTORS
Recent Patents
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 11391093 | Apparatus, rock breaking machine and method of monitoring rock breaking machine | Mar 23, 21 | Jul 19, 22 | Sandvik Mining and Construction Oy |
| 7243745 | Cutting elements and rotary drill bits including same | Jul 28, 04 | Jul 17, 07 | BAKER HUGHES INCORPORATED |
Recent Publications
Not Available
Top Owners in This Subclass
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Patents Issued To Date - By Filing Year
Average Time to Issuance
- 32 Months (last 2 years Issuances)
- 32 Months (last 5 years Issuances)