| | CLASS NOTES |
| 1 | DF | WITH SEISMIC SHOCK GENERATING |
| 2 | DF | BORING WITH EXPLOSION IN INACCESSIBLE HOLE {12} |
| 5 | DF | BORING A SUBMERGED FORMATION {5} |
| 11 | DF | BORING BY DIRECTLY APPLYING HEAT TO FLUIDIZE OR COMMINUTE {5} |
| 17 | DF | WITH HEATING OR COOLING (1) WITHIN THE BORE, OR (2) DRILLING FLUID |
| 18 | DF | ICE BORING |
| 19 | DF | BORING WITHOUT EARTH REMOVAL (I.E., COMPACTING EARTH FORMATION) {3} |
| 24 | DF | AUTOMATIC CONTROL {4} |
| 39 | DF | WITH BIT WEAR SIGNAL GENERATING |
| 40 | DF | WITH SIGNALING, INDICATING, TESTING OR MEASURING {8} |
| 51 | DF | WITH SELF-ACTING CYCLIC ADVANCE AND RETRACTION OF TOOL OR TOOL SHAFT |
| 52 | DF | WITH MAGAZINE FOR SUCCESSIVELY MOVING UNCONNECTED, ORIENTED TOOL OR SHAFT SECTIONS TO USE POSITION |
| 53 | DF | ENLARGEMENT OF EXISTING PILOT THROUGHBORE REQUIRING ACCESSIBILITY TO EXISTING OPPOSITE BORE ENDS TO INSERT AND REMOVE TOOL |
| 54 | DF | BORING BY BELOW GROUND RECIRCULATION OF UNSUPPORTED ELEMENTS (E.G., SHOT) |
| 55 | DF | TOOL ACTUATION BY REACTION OF ROTATING ECCENTRIC MASS |
| 56 | DF | NATURAL VIBRATION CHARACTERISTIC OF AN ELEMENT OF BORING MEANS RELATED (1) TO NATURAL VIBRATION CHARACTERISTIC OF ANOTHER ELEMENT, OR (2) TO FREQUENCY OF AN IMPOSED MOTION |
| 57 | DF | PROCESSES {5} |
| 73 | DF | MEANS TRAVELING WITH TOOL TO CONSTRAIN TOOL TO BORE ALONG CURVED PATH {3} |
| 77 | DF | SIDE WALL TOOL FED LATERALLY WITHOUT ROTATION FROM INACCESSIBLE HOLE |
| 78 | DF | MEANS CARRIED BY HOUSING INSERTABLE IN INACCESSIBLE HOLE TO ADVANCE SIDE WALL TOOL LATERALLY |
| 79 | DF | TOOL SHAFT ADVANCED RELATIVE TO GUIDE INSERTABLE IN INACCESSIBLE HOLE TO CHANGE DIRECTION OF ADVANCE {3} |
| 84 | DF | WITH ABOVE-GROUND CLEANER FOR BORING MEANS |
| 85 | DF | WITH ORIENTING OR RACKING MEANS FOR UNCONNECTED TOOLS OR SECTIONS OF SHAFT OR CASING |
| 86 | DF | WITH BELOW-GROUND PERSONAL ACCOMMODATION |
| 87 | DF | CONVERTIBLE |
| 88 | DF | WITH MEANS CARRYING CUTTINGS LATERALLY OF BORE AXIS COMPRISING (1) CHUTE, (2) CONVEYER, OR (3) VEHICLE |
| 89 | DF | TOOL ELEMENT OR CONTINUOUSLY DRIVEN FLEXIBLE OR ARTICULATED ENDLESS MEMBER {1} |
| 91 | DF | BORING MEANS INCLUDING A CONTINUOUSLY ROTATING BIT DESCRIBING A NONCIRCULAR CROSS-SECTIONAL BORE |
| 92 | DF | WITH BELOW-GROUND TOOL DRIVE PRIME MOVER {11} |
| 108 | DF | COMMON DRIVE OR ADVANCING MEANS FOR CONCURRENTLY BORING ALONG LATERALLY SPACED AXES |
| 113 | DF | WITH MEANS TO SIMULTANEOUSLY FEED AND ROTATE TOOL FROM A SINGLE MECHANICAL ELEMENT {3} |
| 122 | DF | WITH MEANS TO FEED DRIVE |
| 135 | DF | WITH ABOVE-GROUND MEANS TO IMPACT AN EARTH-PENETRATING MEANS |
| 161 | DF | WITH ABOVE-GROUND MEANS TO MOVE TOOL TO A DUMPING LOCATION OFFSET FROM BORE |
| 162 | DF | WITH ABOVE-GROUND MEANS TO FEED TOOL |
| 170 | DF | WITH TOOL DRIVE PRIME MOVER OR ABOVE-GROUND MECHANICAL MOTION CONVERTING DRIVE MEANS {5} |
| 202 | DF | ABOVE-GROUND MEANS FOR RELATIVELY MOVING BELOW-GROUND TOOL ELEMENTS |
| 203 | DF | WITH ABOVE-GROUND MEANS TO ADVANCE OR RETRACT BORING MEANS |
| 205 | DF | WITH MEANS PROVIDING PRESSURIZED GAS CONTACT WITH DRILLING LIQUID |
| 206 | DF | WITH ABOVE-GROUND MEANS FOR PREPARING OR SEPARATING DRILLING FLUID CONSTITUENTS |
| 207 | DF | WITH ABOVE-GROUND MEANS FOR HANDLING DRILLING FLUID OR CUTTING {9} |
| 219 | DF | WITH PARTICULAR ACCOMMODATION FOR PERSONNEL (E.G., SEAT OR PROTECTOR) |
| 220 | DF | WITH ABOVE-GROUND GUIDE FOR RELATIVELY ADVANCING TOOL |
| 226 | DF | WITH SAMPLE COVERING OR COATING MEANS (1) DISPENSED INTO SAMPLE RECEIVER, OR (2) FLUENT |
| 227 | DF | WITH STORAGE MEANS FOR BIT LUBRICANT CARRIED BY BIT OR SHAFT {2} |
| 230 | DF | WITH EXPANSIBLE BORE WALL ANCHOR (E.G., PACKER) |
| 231 | DF | WITH MEANS MOVABLE RELATIVE TO TOOL BELOW GROUND TO CONTROL ECCENTRIC FLUID EMISSION |
| 232 | DF | WITH MEANS MOVABLE RELATIVE TO TOOL BELOW GROUND TO STOP FLOW TOWARD BORE BOTTOM {8} |
| 244 | DF | WITH MEANS MOVABLE RELATIVE TO TOOL TO RECEIVE, RETAIN, OR SEVER UNDISTURBED CORE {3} |
| 256 | DF | WITH RELEASABLE MEANS NORMALLY HOLDING JOINTED SHAFT SECTIONS IN ANGULAR RELATION |
| 257 | DF | TOOL REMOVABLE OR INSERTABLE THROUGH OR AROUND DRIVING OR DRIVEN SHAFT OR CASING {2} |
| 263 | DF | CUTTER ELEMENT LATERALLY SHIFTABLE BELOW GROUND (E.G., EXPANSIBLE) {13} |
| 293 | DF | BELOW-GROUND (1) HAMMER, OR (2) IMPACT MEMBERS {7} |
| 307 | DF | WITH CUTTING EDGE COVER |
| 308 | DF | WITH RECEPTACLE {4} |
| 313 | DF | WITH MECHANICAL CLEANER FOR BIT OR CUTTER ELEMENT |
| 314 | DF | WITH WELL-TYPE SCREEN |
| 315 | DF | COMBINED |
| 316 | DF | WITH RELATIVELY MOVABLE PARTS TO FACILITATE CLEANING WITHOUT DISASSEMBLY |
| 317 | DF | WITH MEANS MOVABLE RELATIVE TO TOOL OR SHAFT TO CONTROL BELOW-GROUND PASSAGE {1} |
| 319 | DF | BELOW-GROUND MECHANICAL MOTION CONVERTING MEANS RELATIVELY MOVING PLURAL CUTTING EDGES |
| 320 | DF | WITH TOOL SHAFT DETAIL {4} |
| 327 | DF | BIT OR BIT ELEMENT {21} |
| 424 | DF | MISCELLANEOUS (E.G., EARTH-BORING NOZZLE) |
| 423 | DF | WEDGING SLIP ASSEMBLY FOR SUPPORTING A PIPE OR ROD |
