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United States Utility Patents
4,980,520 - 4,980,529
Previous 10 Next 10
| Number | | Title |
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4,980,520 |
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Trolley-pole retrieval method and apparatus |
|
4,980,521 |
|
Power transmission apparatus |
|
4,980,522 |
|
Operating key switch unit |
|
4,980,523 |
|
Appliance programmer/timer with bi-directional drive |
|
4,980,524 |
|
Key switch operable by a cylinder lock |
|
4,980,525 |
|
Linked circuit breakers having a handle tie bar (interlocking lever) |
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4,980,526 |
|
Device and method for testing acceleration shock sensors |
|
4,980,527 |
|
Arc spinner interrupter |
|
4,980,528 |
|
Arc interrupter |
|
4,980,529 |
|
Method and apparatus for uniform heating in a microwave field |
For U.S. patent law, rules, and procedures see MPEP.
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