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Freiburg, Germany

Litef Gmbh

USPTO Granted Patents = 75

% Expired Patents = 8.0

CIPO Patents = 2

Trademarks = 1

Forward Citations = 731

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64 inventors (with patents filed for the assignee):

Eberhard Handrich (14 out of 14 patents)

Guenter Spahlinger (8 out of 16 patents)

Werner Schroeder (8 out of 8 patents)

4. Bruno F Ryrko (7 out of 7 patents)

5. Gunter Spahlinger (6 out of 7 patents)

6. Uwe Breng (5 out of 7 patents)

7. Sven Voigt (5 out of 9 patents)

8. Manfred Kemmler (5 out of 5 patents)

9. Martin Hafen (5 out of 6 patents)

10. Wolfgang Hassenpflug (5 out of 5 patents)

11. Maik Wiemer (3 out of 6 patents)

12. Werner Schroder (3 out of 3 patents)

13. Thomas Gessner (2 out of 18 patents)

14. Peter Leinfelder (2 out of 7 patents)

15. Wolfram Geiger (2 out of 10 patents)

Core Competencies:

Sagnac Interferometer

Digital Phase Modulator

Coriolis Gyro

Micromechanical Sensor

Optoelectronic Positioning

Acceleration Measurement

Fiber Optic Coil

Stabilization Method

Measurement Device

Navigation System

Optical Resonator

Bias Compensation

75 patents: Sort by Forward Citations

1. 7964428 - Micromechanical component and method for fabricating a micromechanical component (2011-06-21),

2. 7961373 - High-resolution digital phase modulator for a fiber-optic signal transmission or measurement device (2011-06-14),

3. 7805993 - Operating method for a Coriolis gyro, and evaluation/control electronics which are suitable for this purpose (2010-10-05),

4. 7639757 - Pulse modulator and pulse modulation method (2009-12-29),

5. 7490015 - Method for controlling/regulating a physical quantity of a dynamic system, in particular a micromechanical sensor (2009-02-10),

6. 7481110 - Method for quadrature-bias compensation in a Coriolis gyro, as well as a Coriolis gyro which is suitable for this purpose (2009-01-27),

7. 7469075 - Digital phase modulator for a fiber-optic device (2008-12-23),

8. 7340954 - Method for measurement of rotation rates/accelerations using a rotation rate coriolis gyro, as well as a coriolis gyro which is suitable for this purpose (2008-03-11),

9. 7337665 - Method for electronically tuning the readout vibration of a coriolis gyroscope (2008-03-04),

10. 7324206 - Method for determination/compensation of bias errors/random walk errors induced by the light source in fiber-optic Sagnac interferometers (2008-01-29),

11. 7283246 - Method for regulating the operating frequency and multifunctional integrated circuit chip for a fiber-optic gyroscope (2007-10-16),

12. 7278312 - Method for electronic tuning of the read oscillation frequency of a coriolis gyro (2007-10-09),

13. 7249488 - Method for detecting a zero-point error of a coriolis gyroscope and coriolis gyroscope using said method (2007-07-31),

14. 7246512 - Method for determining a zero-point error in a vibratory gyroscope (2007-07-24),

15. 7231823 - Method for electronically adjusting the selective oscillation frequency of a Coriolis gyro (2007-06-19),

Litef GmbH, based in Freiburg, Germany, specializes in advanced fiber optic technology, focusing on precision measurement and sensor systems. The company is recognized for its expertise in Sagnac interferometers and digital phase modulators, which are integral to applications in navigation and stabilization. Litef's innovations include Coriolis gyros and micromechanical sensors, enhancing optoelectronic positioning and acceleration measurement capabilities. Their solutions are pivotal in various industries, including aerospace and automotive, where accuracy and reliability are paramount.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Sep 29 2026

75 Patents

#5 in Freiburg

#768 in Germany

#9,996 in the World

Freiburg, Germany

Litef Gmbh

Forward Citations = 731

64 inventors:

Eberhard Handrich (14 out of 14 patents)

Guenter Spahlinger (8 out of 16 patents)

Werner Schroeder (8 out of 8 patents)

4. Bruno F Ryrko (7 out of 7 patents)

5. Gunter Spahlinger (6 out of 7 patents)

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