Patent US 4267516A

Patent number	US 4267516A (click link for details and documents via Google Patents)
Title	Common-emitter fT doubler amplifier employing a feed forward amplifier to reduce non-linearities and thermal distortion
Inventors	Einar Traa
Company	Tektronix Inc
Filing date	1979-08-03
Grant date	1981-05-12

This patent describes Traa's "Traashcomp" amplifier design − see John Addis, Good Engineering and Fast Vertical Amplifiers, in Jim Williams (Ed.), Analog Circuit Design: Art, Science and Personalities (1991), p.117