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Constance J Chang-Hasnain

Stanford, CA, United States of America

Constance J Chang-Hasnain

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This inventor holds 30 USPTO granted patents and 1 EPO patent, primarily in Vertical Cavity Lasers. Top assignees: Bandwidth9, Inc., University of California, Leland Stanford Junior University. Active years: 1990-2024.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Constance J Chang-Hasnain. Retrieved from https://idiyas.com/inventor/constance-j-chang-hasnain

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 30

% Patents Active = 96.7


Average Co-Inventor Count = 3.3

ph-index = 15

Forward Citations = 475(Granted Patents)


Location History:

  • Edison, NJ (US) (1990 - 1991)
  • Stanford, CA (US) (1996 - 1997)
  • Union City, CA (US) (1998 - 2004)
  • Palo Alto, CA (US) (1998 - 2024)

Company Filing History:

goldMedal12 out of 20 
 
Bandwidth9, Inc.
 patents
silverMedal8 out of 16,025 
 
University of California
 patents
bronzeMedal6 out of 5,512 
 
Leland Stanford Junior University
 patents
4. 2 out of 670 
 
Bell Communications Research, Inc.
 patents
5. 1 out of 1 
 
Bandwidth Unlimited, Inc.
 patent
6. 1 out of 57 
 
Sru Biosystems, Inc.
 patents
7. 1 out of 1,694 
 
University of Southern California
 patents
8. 2 out of 834,513 
Other
 patents
where one patent can have more than one assignee

Years Active: 1990-2024

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Areas of Expertise:
Vertical Cavity Surface Emitting Laser
Tunable Lasers
Optical Multiplexer
Biochemical Detection
Epitaxial Growth
Neutron Generator
Wavelength Stabilization
Opto-Electronic Devices
Semiconductor Laser
Quantum-Well Laser
Optical Signal Routing
Micromechanical Tunable Device
30 patents (USPTO):Explore Patents
1. 12136798 - Vertical cavity surface emitting device with a buried index guiding current confinement layer (2024-11-05),
2. 12068580 - Oxide spacer HCG VCSELS and fabrication methods (2024-08-20),
3. 12046873 - Air cavity dominant VCSELs with a wide wavelength sweep (2024-07-23),
4. 11881683 - Epitaxial growth on a gallium arsenide phosphide capped material on a gallium arsenide substrate (2024-01-23),
5. 9161429 - Compact ion source neutron generator (2015-10-13),
6. 7497992 - Detection of biochemical interactions on a biosensor using tunable filters and tunable lasers (2009-03-03),
7. 6760357 - Vertical cavity apparatus with tunnel junction (2004-07-06),
8. 6535541 - Vertical cavity apparatus with tunnel junction (2003-03-18),
9. 6493373 - Vertical cavity apparatus with tunnel junction (2002-12-10),
10. 6493372 - Vertical cavity apparatus with tunnel junction (2002-12-10),
11. 6493371 - Vertical cavity apparatus with tunnel junction (2002-12-10),
12. 6490311 - Vertical cavity apparatus with tunnel junction (2002-12-03),
13. 6487231 - Vertical cavity apparatus with tunnel junction (2002-11-26),
14. 6487230 - Vertical cavity apparatus with tunnel junction (2002-11-26),
15. 6275513 - Hermetically sealed semiconductor laser device (2001-08-14),

Title: Inventor Constance J. Chang-Hasnain

Introduction: Constance J. Chang-Hasnain is a renowned inventor based in Stanford, CA, known for his groundbreaking contributions to the field of optics and photonics.

Latest Patents: Constance J. Chang-Hasnain holds several patents related to optical devices and systems that have revolutionized the industry. His most recent patents focus on novel methods for enhancing the efficiency of photonic devices.

Career Highlights: With a distinguished career spanning over three decades, Constance J. Chang-Hasnain has held key positions in leading research institutions and universities. He has been instrumental in developing cutting-edge technologies that have been pivotal in advancing the field of photonics.

Collaborations: Throughout his career, Constance J. Chang-Hasnain has collaborated with top researchers, scientists, and industry experts to push the boundaries of optical engineering. His collaborative efforts have resulted in innovative solutions that have been widely recognized and adopted.

Conclusion: Constance J. Chang-Hasnain's relentless pursuit of innovation and his significant contributions to the field of optics make him a trailblazer in the world of photonics. His work continues to inspire future generations of inventors and researchers in the pursuit of technological advancement.

Profile summary based on public USPTO records.
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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