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Patent US 3584174A: Difference between revisions
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|Grant date=1971-06-08 | |Grant date=1971-06-08 | ||
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This patent describes the [[back-lit switches]] that Tek introduced at the end of the 1960s for the [[7000-series scopes]]/plugins, and other instruments. | |||
[[File:Tek_7k_DPDT_PCB_switch_1.jpg|thumb|400px]] | |||