For the Inventor, By the Inventor

Enter assignee name

Lincoln, NE, United States of America

J.a. Woollam Co.

USPTO Granted Patents = 210

EPO Patents = 13

Trademarks = 31

Forward Citations = 2,115

Loading Chart...

Loading Chart...

55 inventors (with patents filed for the assignee):

Martin M Liphardt (113 out of 121 patents)

Blaine D Johs (95 out of 102 patents)

Craig M Herzinger (86 out of 88 patents)

4. Ping He (68 out of 78 patents)

5. John A Woollam (55 out of 61 patents)

6. Galen L Pfeiffer (40 out of 42 patents)

7. Steven E Green (38 out of 38 patents)

8. Jeffrey S Hale (34 out of 34 patents)

9. James D Welch (26 out of 53 patents)

10. Thomas E Tiwald (21 out of 21 patents)

11. Christopher A Goeden (14 out of 16 patents)

12. Ronald A Synowicki (13 out of 13 patents)

13. Tino Hofmann (13 out of 18 patents)

14. Mathias M Schubert (11 out of 16 patents)

15. Stefan Schoeche (9 out of 9 patents)

Core Competencies:

Ellipsometry

Reflectometry

Spectrophotometry

Mueller Matrix

Birefringence

Optical Hall Effect

Beam Focusing

Sample Imaging

Metamaterials

Terahertz Technology

Calibration Techniques

Optical Constants

210 patents: Sort by Forward Citations

1. 12449351 - Method of determining absorption and extinction coefficient of prism shaped material (2025-10-21),

2. 12405210 - System for, and calibration and testing of directed beam ellipsometer systems (2025-09-02),

3. 12332163 - System for, and calibration and testing of directed beam ellipsometer systems (2025-06-17),

4. 11885738 - Reflectometer, spectrophotometer, ellipsometer or polarimeter system including sample imaging system that simultaneously meet the scheimpflug condition and overcomes keystone error (2024-01-30),

5. 11821833 - Fast and accurate Mueller matrix infrared ellipsometer (2023-11-21),

6. 11740176 - Fast and accurate mueller matrix infrared spectroscopic ellipsometer (2023-08-29),

7. 11675208 - Reflectometer, spectrophotometer, ellipsometer and polarimeter system with a super continuum laser source of a beam of electromagnetism, and improved detector system (2023-06-13),

8. 11391666 - Snapshot ellipsometer (2022-07-19),

9. 10989601 - Beam focusing and reflective optics (2021-04-27),

10. 10914866 - Methods and materials for metamaterials exhibiting form-induced birefringence (2021-02-09),

11. 10859439 - Reflectometer, spectrophotometer, ellipsometer or polarimeter system including sample imaging system that simultaneously meets scheimpflug condition and overcomes keystone error (2020-12-08),

12. 10775298 - Ellipsometer or polarimeter system having at least one rotating element which is driven by a motor comprising air bearing (2020-09-15),

13. 10634607 - Snapshot ellipsometer (2020-04-28),

14. 10627288 - Systems and methods for producing a more uniform intensity wavelength dispersed beam of electromagnetic radiation entering a multielement detector, while maintaining information content therein (2020-04-21),

15. 10606093 - Biased fast axis retarder system (2020-03-31),

J.A. Woollam Co. is a leading provider of spectroscopic ellipsometers for thin film and bulk material characterization. With over 35 years of experience, we offer accurate and reliable solutions for research, development, and production applications in various industries. Our innovative instruments provide precise measurement data on thin film thickness, optical constants, and material properties. Visit our website to explore our comprehensive range of advanced spectroscopic ellipsometers and learn how we can help optimize your material analysis and manufacturing processes.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 9 2025

210 Patents

#2 in Lincoln, NE

#7 in Nebraska

#1,903 in US

#3,923 in the World

Lincoln, NE, United States of America

J.a. Woollam Co.

Forward Citations = 2,115

55 inventors:

Martin M Liphardt (113 out of 121 patents)

Blaine D Johs (95 out of 102 patents)

Craig M Herzinger (86 out of 88 patents)

4. Ping He (68 out of 78 patents)

5. John A Woollam (55 out of 61 patents)

Please report any incorrect information to support@idiyas.com

Loading…