Description
Class E21B : EARTH OR ROCK DRILLING
Subclass 1/14: Percussion drilling (drives used in the borehole E21B 4/00) with a reciprocating impulse member (E21B 1/02, E21B 1/38 take precedence) driven by a rotating mechanism
E21B 1/14
Sub-Class
Stats
- 8 US PATENTS IN FORCE
- 1 US APPLICATIONS PENDING
- 4 Total Patent Owners
- 24 TOTAL INVENTORS
Recent Patents
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 12234690 | Experimental apparatus for rock-breaking through vibration impact | May 12, 23 | Feb 25, 25 | CHINA UNIVERSITY OF PETROLEUM - BEIJING (CUPB) |
| 12071813 | Drill | Apr 16, 21 | Aug 27, 24 | Not available |
| 11319752 | Percussion device | Aug 06, 19 | May 03, 22 | Not available |
| 8727034 | Rotary power tool operable in first speed mode and a second speed mode | Feb 19, 08 | May 20, 14 | ROBERT BOSCH GMBH |
| 8579042 | Battery pack and cordless tool using the same | Feb 19, 13 | Nov 12, 13 | HITACHI KOKI CO., LTD. |
| 8381829 | Battery pack and cordless tool using the same | Feb 28, 07 | Feb 26, 13 | HITACHI KOKI CO., LTD. |
| 8322463 | Down hole multiple piston tools operated by pulse generation tools and methods for drilling | Jan 30, 08 | Dec 04, 12 | Lewal Drilling Ltd. |
| 7201235 | Driver drill | Nov 09, 04 | Apr 10, 07 | MAKITA CORPORATION |
Recent Publications
| Publication # | Title | Filing Date | Pub Date | Patent Owner |
|---|---|---|---|---|
| 2023/0151,693 | A DRILL | Apr 16, 21 | May 18, 23 | Not available |
Top Owners in This Subclass
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Patents Issued To Date - By Filing Year
Average Time to Issuance
- 35 Months (last 2 years Issuances)
- 35 Months (last 5 years Issuances)