Class 340 Communications: Electrical... Patent Classification Definitions... Patent And Trademark Office... U.S. Dept. Of Commerce... June 1997

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Class 340 Communications: Electrical... Patent Classification Definitions... U.S. Dept. Of Commerce - Patent And Trademark Office... June 1998

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Class 340 Communications: Electrical... Patent Classification Definitions... Patent And Trademark Office... U.S. Dept. Of Commerce... December 1996

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Class 340 - Communications: Electrical, Patent Classification Definitions, Patent & Trademark Office U.S. Dept. of Commerce, December 1999

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Class 364 Electrical Computers And Data Processing Systems... Patent Classification Definitions... Patent And Trademark Office... U.S. Dept. Of Commerce... June 1997

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Class 340 Communications: Electrical Patent Classification Definitions U.S. Dept. Of Commerce December 1998

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Class 338 Electrical Resistors... Patent Classification Definitions... Patent And Trademark Office... U.S. Dept. Of Commerce... June 1997

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Class 174 Electricity: Conductors And Insulators... Patent Classification Definitions... Patent And Trademark Office... U.S. Dept. Of Commerce... June 1997

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Class 361 Electricity: Electrical Systems And Devices... Patent Classification Definitions... Patent And Trademark Office... U.S. Dept. Of Commerce... June 1997

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Class 220 Receptacles... Patent Classification Definitions... Patent And Trademark Office... U.S. Dept. Of Commerce... June 1997

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