FS

Franz Spirk

SA Siemens Aktiengesellschaft: 9 patents #1,230 of 22,248Top 6%
Overall (All Time): #591,877 of 4,157,543Top 15%
9
Patents All Time

Issued Patents All Time

Showing 1–9 of 9 patents

Patent #TitleCo-InventorsDate
5196751 Large-diameter a.c. motor with joints in the stator 1993-03-23
4672252 Electrical machine with a stator lamination of grain-oriented sheets 1987-06-09
4621211 Electrical machine brushes and sliprings with brush dust collecting apparatus 1986-11-04
4367890 Turbine set with a generator feeding a network of constant frequency 1983-01-11
4338537 Synchronous turbine type electric motor Joachim Eckert 1982-07-06
4322645 Liquid-cooled electric machine Detlef Vandamme 1982-03-30
4283648 Synchronous electric machine with salient poles in the rotor 1981-08-11
4277709 Large diameter synchronous electric machine 1981-07-07
4211946 Asynchronous electric machine Joachim Eckert 1980-07-08