![]() Electronic File Wrappers | ![]() Electronic Patent Documents | ![]() Paper Patent Documents | Current as of: June, 1999
| ![]() and Services |
| CLASS NOTES | ||
| 1.05 | DF | AUTOMATIC CONTROL; SIGNALING OR INDICATING {4} |
| 2 | DF | TUNNEL RECOVERY OF FLUID MATERIAL |
| 3 | DF | IN SITU CONVERSION OF SOLID TO FLUID {3} |
| 7 | DF | WITH SEPARATION OF MATERIALS {2} |
| 10 | DF | PROCESSES {7} |
| 19 | DF | MINE LAYOUTS |
| 20 | DF | EXPANSIBLE BREAKING-DOWN DEVICES {2} |
| 24 | DF | ICE-WORKING DEVICES {1} |
| 29 | DF | HARD MATERIAL DISINTEGRATING MACHINES {17} |
| 79.1 | DF | CUTTER TOOTH OR TOOTH HEAD {17} |
| 95 | DF | MISCELLANEOUS |