Inventor
FRANZ ANDREAS
DE37 patents
⚠️ This page may combine multiple inventors who share the name “FRANZ ANDREAS”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HEIDENHAIN GMBH DR JOHANNES
12 patentsUS5631736AMay 20, 1997
Absolute interferometer measuring process and apparatus having a measuring interferometer, control interferometer and tunable laser
HEIDENHAIN GMBH DR JOHANNES103 citations97
US5396328AMar 7, 1995
Waveguide type displacement interferometer having two reference paths
HEIDENHAIN GMBH DR JOHANNES114 citations96
US5576537ANov 19, 1996
Photoelectric position measuring system using gratings having specified dimensions to suppress harmonics
HEIDENHAIN GMBH DR JOHANNES43 citations93
US6472658B2Oct 29, 2002
Photoelectric position measuring system that optimizes modulation of a scanning device and the intensity of a reference mark signal
HEIDENHAIN GMBH DR JOHANNES31 citations92
US5786931AJul 28, 1998
Phase grating and method of producing phase grating
HEIDENHAIN GMBH DR JOHANNES32 citations92
US5574560ANov 12, 1996
Dual-beam interferometer with a phase grating
HEIDENHAIN GMBH DR JOHANNES34 citations92
US5696584ADec 9, 1997
Phase grating having an unprotected relief structure with a grating structure that causes destructive interference of reflections
HEIDENHAIN GMBH DR JOHANNES17 citations74
US5583798ADec 10, 1996
Position measuring method and apparatus for generating periodic signals free of harmonics
HEIDENHAIN GMBH DR JOHANNES16 citations74
US5162869ANov 10, 1992
Apparatus and method having at least one waveguide coupler to create at least two signals having a mutual phase shift not equal to 180 degrees
HEIDENHAIN GMBH DR JOHANNES9 citations74
US5113066AMay 12, 1992
Integrated optical sensor arrangement with detecting means, and means for controlling the optical emission wavelength of the light beam source
HEIDENHAIN GMBH DR JOHANNES13 citations74
US5271078ADec 14, 1993
Device for coupling and/or decoupling beams of light, with an integrated optical component
HEIDENHAIN GMBH DR JOHANNES19 citations70
US5173601ADec 22, 1992
Angle measuring device with correction grid
HEIDENHAIN GMBH DR JOHANNES4 citations63
MANN & HUMMEL GMBH
12 patentsUS6853203B2Feb 8, 2005
Oil quality measurement device
MANN & HUMMEL GMBH39 citations92
US10596985B2Mar 24, 2020
Operating method for a filter system and filter system
MANN & HUMMEL GMBH3 citations73
US7713324B2May 11, 2010
Filter
MANN & HUMMEL GMBH7 citations73
US9388867B2Jul 12, 2016
Brake dust collector for motor vehicles
MANN & HUMMEL GMBH6 citations72
US10744444B2Aug 18, 2020
Filter Element, in Particular for Gas Filtration, and filter device
MANN & HUMMEL GMBH2 citations70
US11731067B2Aug 22, 2023
Filter element for filtration and dehumidification of a gas
MANN & HUMMEL GMBH0 citations62
US11338237B2May 24, 2022
Hollow filter element, in particular for gas filtration
MANN & HUMMEL GMBH0 citations61
US9333449B2May 10, 2016
Method for producing a ceramic filter element
MANN & HUMMEL GMBH0 citations52
US10898842B2Jan 26, 2021
Filter element, in particular for gas filtration
MANN & HUMMEL GMBH0 citations51
US10773201B2Sep 15, 2020
Annular filter element, in particular for gas filtration
MANN & HUMMEL GMBH0 citations40
US7862639B2Jan 4, 2011
Intake filter for an internal combustion engine of a motor vehicle
MANN & HUMMEL GMBH0 citations34
US10252208B2Apr 9, 2019
Filter element with filter bellows
MANN & HUMMEL GMBH0 citations30