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United States Utility Patents
4,434,320 - 4,434,329
Previous 10 Next 10
| Number | | Title |
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4,434,320 |
|
Contractible conduit sealing connector |
|
4,434,321 |
|
Multilayer printed circuit boards |
|
4,434,322 |
|
Coded data transmission system |
|
4,434,323 |
|
Scrambler key code synchronizer |
|
4,434,324 |
|
Reversal of connections of telegraphic line wires upon detection of unwanted polarity of the loop current |
|
4,434,325 |
|
Volume control for an audio apparatus |
|
4,434,326 |
|
Circuit arrangement for establishing and terminating a data connection |
|
4,434,327 |
|
Electret transducer with variable actual air gap |
|
4,434,328 |
|
Remotely actuated telephone instrument connection block having instrument lockout feature |
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4,434,329 |
|
Microphone device built in a tape recorder |
For U.S. patent law, rules, and procedures see MPEP.
Disclaimer. Information presented on this page while believed to be reliable, is provided "as is" with no warranties of its accuracy or timeliness. For legal advice seek help of a licensed professional.
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