Inventor

WILMAN JOHN G

US3 patents

Patents

3 patents

US5022765AJun 11, 1991

Nulling optical bridge for contactless measurement of changes in reflectivity and/or transmissivity

IBM7 citations71

US5325181AJun 28, 1994

Nulling optical bridge for measurement of changes in reflectivity and/or transmissivity

IBM7 citations67

US4587464AMay 6, 1986

Electron beam control system

IBM2 citations58