What's new

Mark Gillard Turntables new topic
Termboon Dej-udom Spectral Audio topic reply
David Jacobs Quadraflex 969 specifications
Pharmd52 Optimus topic reply
Pharmd215 Optimus topic reply

Patents on solid state amplifiers


Patent number Description Filed / Granted Available
5,647,004 Sondermeyer , et al. Multi-stage solid state amplifier that emulates tube distortion July 8, 1997  



US Patent & trademark Office

The IBM patent server