Inventor
FRITSCHE STEVEN L
US2 patents
Patents
2 patentsUS5092227AMar 3, 1992
Apparatus for controlling the ventilation of laboratory fume hoods
LANDIS & GYR POWERS INC78 citations94
US5170673ADec 15, 1992
Method and apparatus for determining the uncovered size of an opening adapted to be covered by multiple moveable doors
LANDIS & GYR POWERS INC48 citations90