Inventor
FRUENGEL FRANK
CH7 patents
⚠️ This page may combine multiple inventors who share the name “FRUENGEL FRANK”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
FRUENGEL FRANK
6 patentsUS4259592AMar 31, 1981
Ceilometric method and apparatus
FRUENGEL FRANK56 citations93
US4722599AFeb 2, 1988
Device for measuring cloud height
FRUENGEL FRANK35 citations89
US4432645AFeb 21, 1984
Forward-scatter visibility meter
FRUENGEL FRANK16 citations71
US4288158ASep 8, 1981
Laser ceilometer with safety power-reduction feature
FRUENGEL FRANK8 citations71
US4451128AMay 29, 1984
Method of and a device for adjusting a high-speed photographic arrangement
FRUENGEL FRANK4 citations60
US4515477AMay 7, 1985
Visibility meter and components used therein
FRUENGEL FRANK1 citations49