US Patent Class 290
PRIME-MOVER DYNAMO PLANTS-- Main Headings
 Electronic File Wrappers |  Electronic Patent Documents |  Paper Patent Documents | Current as of: June, 1999
|  and Services |
| Electronic File Wrappers | Electronic Patent Documents | Paper Patent Documents | Current as of: June, 1999
| and Services |
| CLASS NOTES | ||
| 1 R | DF | MISCELLANEOUS {5} |
| 2 | DF | HEATING PLANTS |
| 3 | DF | TRAIN |
| 4 R | DF | PLURAL PRIME MOVER {4} |
| 5 | DF | ALTERNATING CURRENT, ROTARY FIELD AND ARMATURE |
| 6 | DF | MULTIPLE-ARMATURE DYNAMO |
| 7 | DF | ELECTRIC CONTROL {10} |
| 45 | DF | TRACTION |
| 46 | DF | STARTING AND GENERATING DYNAMO |
| 47 | DF | ELECTRIC-STARTING MOTOR WITH GENERATOR |
| 48 | DF | ELECTRIC-STARTING MOTOR |
| 49 | DF | ROTARY FIELD AND ARMATURE |
| 50 | DF | BATTERY |
| 51 | DF | ENGINE CONTROL |
| 52 | DF | TURBOGENERATORS |
| 53 | DF | TIDE AND WAVE MOTORS |
| 54 | DF | FLUID-CURRENT MOTORS {1} |