De forest and the first electrosurgical unit.
Geddes
L A
LA
Roeder
R A
RA
D001698:Biomedical Engineering / Q000266:history* / Q000295:instrumentation; D004598:Electrosurgery / Q000266:history* / Q000295:instrumentation; D049672:History, 19th Century; D049673:History, 20th Century; D010330:Patents as Topic / Q000266:history; D014481:United States