Who invented the electrotherapy instrument? Who was the first person to apply for a patent for electrotherapy?

Computer intermediate frequency electrotherapy instrument

Applicant: China People's Liberation Army Air Force General Hospital and China People's Liberation Army Air Force Unit 87333.

Address: West Yard, No.30 West Diaoyutai, Haidian District, Beijing

Inventors (designers): Lin Shide, Liu Huimin and Zhang Chuanxue.

Application number: 85 1073 10

Date of application: 1985- 10-08.