 Electronic File Wrappers |  Electronic Patent Documents |  Paper Patent Documents | Current as of: June, 1999
|  and Services |
| CLASS NOTES | ||
| 1 | DF | STEPPER TYPE {3} |
| 6 | DF | RIGID PORTABLE TRACK {1} |
| 8 | DF | WITH RAIL ENGAGING MEANS |
| 9 | DF | WITH BRAKE |
| 100 | DF | WITH MEANS TO REMOVE OR EXCLUDE FOREIGN MATTER (E.G., SEAL, SCRAPER) {8} |
| 116 | DF | TRACK GUIDE OR ALIGNMENT MECHANISM |
| 117 | DF | WITH LUBRICATION {2} |
| 15 | DF | COMBINED OR CONVERTIBLE |
| 120 | DF | WITH FRAME CARRIED ENDLESS TRACK {1} |
| 19 | DF | SINGLE WHEEL TYPE |
| 20 | DF | WHEEL ON TOP OF UPPER TRACK RUN |
| 124 | DF | WITH TRACK SUPPORT INTERMEDIATE OF END WHEELS {4} |
| 143 | DF | WITH MEANS FOR TENSIONING TRACK BY MOVING AT LEAST ONE ENDWHEEL {7} |
| 33 | DF | WITH INTERPOSED FRICTION DRIVE BELT |
| 34 | DF | INFLATABLE MEANS |
| 157 | DF | ENDLESS BELT HAVING NONMETALLIC TRACK OR TREAD {5} |
| 185 | DF | TRACKS OR TREADS {14} |
| 60 | DF | MISCELLANEOUS |
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| CROSS-REFERENCE ART COLLECTION | ||
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| 900 | DF | MASTER LINK |