US Patent Class 84
MUSIC-- 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 | DF | INSTRUMENTS {9} |
| 453 | DF | ACCESSORIES {6} |
| ****************************** | ||
| DIGESTS | ||
| ****************************** | ||
| DIG 1 | DF | Plural speakers |
| DIG 2 | DF | Preference networks |
| DIG 3 | DF | Foldable; detachable; collapsible |
| DIG 4 | DF | Chorus; ensemble; celeste |
| DIG 5 | DF | Chiff |
| DIG 6 | DF | Cathode-ray tube |
| DIG 7 | DF | Electric key switch structure |
| DIG 8 | DF | Keyed oscillators |
| DIG 9 | DF | Filtering |
| DIG 10 | DF | Feedback |
| DIG 11 | DF | Frequency dividers |
| DIG 12 | DF | Side; rhythm and percussion devices |
| DIG 13 | DF | Gas discharge tube |
| DIG 14 | DF | Harmonicas |
| DIG 15 | DF | Accordions |
| DIG 16 | DF | Crescendo |
| DIG 17 | DF | Cabinets |
| DIG 18 | DF | Tuning |
| DIG 19 | DF | Light sensitive resistor |
| DIG 20 | DF | Monophonic |
| DIG 21 | DF | Mechanical resonator |
| DIG 22 | DF | Chord organs |
| DIG 23 | DF | Electronic gates for tones |
| DIG 24 | DF | Piezoelectrical transducers |
| DIG 25 | DF | Pedal clavier |
| DIG 26 | DF | Reverberation |
| DIG 27 | DF | Stereo |
| DIG 28 | DF | Service manuals |
| DIG 29 | DF | Tape |
| DIG 30 | DF | Fret control |