Inventor
SCHIMPFF FRITHJOF
DE6 patents
⚠️ This page may combine multiple inventors who share the name “SCHIMPFF FRITHJOF”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
WAYSS & FREYTAG AG
5 patentsUS5124093AJun 23, 1992
Process for the production of concrete switch cross ties
WAYSS & FREYTAG AG7 citations69
US4948089AAug 14, 1990
Concrete mold with arrangement for mounting tubular components
WAYSS & FREYTAG AG13 citations64
US5196209AMar 23, 1993
Making a prestressed concrete beam
WAYSS & FREYTAG AG5 citations58
US5227112AJul 13, 1993
Method of making concrete switch cross ties
WAYSS & FREYTAG AG1 citations47
US5127160AJul 7, 1992
Method of fastening construction components in a casing for series-produced finished parts
WAYSS & FREYTAG AG1 citations47