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Patent class list (only not empty are listed)
Deeper subclasses:
| Class / Patent application number | Description | Number of patent applications / Date published |
|---|---|---|
| 033501000 | GAUGE | 413 |
| 033700000 | DISTANCE MEASURING | 191 |
| 033227000 | STRAIGHT-LINE LIGHT RAY TYPE | 158 |
| 033300000 | INDICATOR OF DIRECTION OF FORCE TRAVERSING NATURAL MEDIA | 137 |
| 033403000 | STRAIGHTEDGE TYPE | 80 |
| 033180100 | SCRIBER | 32 |
| 033001000 | MISCELLANEOUS | 22 |
| 033002000 | APPAREL | 11 |