Inventor
ERNST ALFRED
13 patents
⚠️ This page may combine multiple inventors who share the name “ERNST ALFRED”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
ERNST ALFRED
7 patentsUS5309754AMay 10, 1994
Hardness tester and method for measuring the hardness of metallic materials
ERNST ALFRED28 citations91
US4444045AApr 24, 1984
Hand-operated hardness meter
ERNST ALFRED9 citations72
US4262525AApr 21, 1981
Hardness testing apparatus provided with a safety stop device
ERNST ALFRED8 citations72
US4107978AAug 22, 1978
Durometer according to Rockwell system
ERNST ALFRED9 citations72
US4023401AMay 17, 1977
Hand-operable durometer
ERNST ALFRED13 citations72
US4899578AFeb 13, 1990
Driving device for a hardness measuring instrument
ERNST ALFRED4 citations61
US4182162AJan 8, 1980
Durometer
ERNST ALFRED1 citations50
EXTRUDE HONE GMBH
2 patentsUS7310994B2Dec 25, 2007
Method and device for obtaining a determined flow resistance of a flow channel by means of a measuring bridge
EXTRUDE HONE GMBH5 citations65
US7743645B2Jun 29, 2010
Method and device for obtaining a determined flow resistance of a flow channel by means of a measuring bridge
EXTRUDE HONE GMBH0 citations43