P

Inventor

SPANNHAKE STEFAN

DE9 patents
⚠️ This page may combine multiple inventors who share the name “SPANNHAKE STEFAN”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

OTIS ELEVATOR CO

5 patents
US6267219B1Jul 31, 2001

Electronic safety system for escalators

OTIS ELEVATOR CO94 citations95
US5883345AMar 16, 1999

Sonic position measurement system

OTIS ELEVATOR CO40 citations91
US6591947B2Jul 15, 2003

Use of multi-state sensors

OTIS ELEVATOR CO13 citations82
US6626279B2Sep 30, 2003

Process for switching between main supply and a frequency inverter and vice versa for an escalator drive

OTIS ELEVATOR CO10 citations70
US6782989B2Aug 31, 2004

Process for switching between mains supply and a frequency inverter and vice versa

OTIS ELEVATOR CO3 citations58

SPANNHAKE STEFAN

1 patent
US9059584B2Jun 16, 2015

Circuit arrangement for limiting the overvoltage of an excitation winding of a synchronous machine having rapid de-excitation

SPANNHAKE STEFAN5 citations67

OTISCELECATOR COMPANY

1 patent
US6634463B2Oct 21, 2003

Switch over from the mains supply to a frequency converter by a phase correction process for an escalator drive

OTISCELECATOR COMPANY8 citations63

IAV GMBH

1 patent
US7650954B2Jan 26, 2010

Method for controlling the drive power distribution in a motor vehicle with hybrid drive

IAV GMBH4 citations54

HERRANZ GRACIA MERCEDES

1 patent
US9531304B2Dec 27, 2016

Method and device for operating an electrical machine having separate excitation

HERRANZ GRACIA MERCEDES2 citations50