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| Class Numbers & Titles | Class Numbers Only | USPC Index | International | HELP | Office of Patent Classification |
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| USPC Consolidated Glossary |
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| Terms Beginning with | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
QE - Class 438
QFP - Class 438
QUANTIZED STATES - Class 257
QUANTUM CELL - Class 977
QUANTUM CELL WIRE - Class 977
QUANTUM COMPUTING - Class 977
QUANTUM DOT - Class 977
QUANTUM ENTANGLEMENT - Class 977
QUANTUM TRANSISTOR - Classes 257, 438
QUANTUM TUNNELING - Class 977
QUANTUM UNCERTAINTY PRINCIPLE - Class 977
QUANTUM WELL - Classes 257, 438, 977
QUANTUM WIRE - Class 977
QUARTZ - Classes 117, 428
QUARTZ, FUSED - Class 117
QUIP - Class 438
QUIRE(*) - Class 412
QW - Class 438
QWIP - Class 438
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