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United States Utility Patents
3,992,580 - 3,992,589
Previous 10 Next 10
| Number | | Title |
|
3,992,580 |
|
Discrete control correction for synchronizing digital networks |
|
3,992,581 |
|
Phase locked loop NRZ data repeater |
|
3,992,582 |
|
Reverberation sound producing apparatus |
|
3,992,583 |
|
Universal flexible acoustic coupler muff system |
|
3,992,584 |
|
Automatic microphone mixer |
|
3,992,585 |
|
Self-energizing electrostatic loudspeaker system |
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3,992,586 |
|
Boardroom sound reinforcement system |
|
3,992,587 |
|
Remote data line monitor |
|
3,992,588 |
|
Multiple digit dialing module |
|
3,992,589 |
|
Frequency multiplex system for transmission of telephone and videophone channels |
For U.S. patent law, rules, and procedures see MPEP.
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