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* http://www.vintagetek.org/wp-content/uploads/2011/10/Tek-series-500-development.pdf | * http://www.vintagetek.org/wp-content/uploads/2011/10/Tek-series-500-development.pdf | ||
* http://www.vintagetek.org/my-early-tektronix-days-by-john-kobbe-2/ | * http://www.vintagetek.org/my-early-tektronix-days-by-john-kobbe-2/ | ||
* [http://w140.com/US2930986.pdf US Patent 2,930,986: J. R. Kobbe, "Distributed Amplifier"] | |||
[[Category:Tektronix People]] | [[Category:Tektronix People]] |