For the Inventor, By the Inventor

Enter assignee name

Waltham, MA, United States of America

Ztek Corporation

USPTO Granted Patents = 22

% Expired Patents = 18.2

Forward Citations = 941

Loading Chart...

Loading Chart...

7 inventors (with patents filed for the assignee):

Michael S Hsu (20 out of 31 patents)

Ethan D Hoag (6 out of 23 patents)

Robin Y P Ong (2 out of 2 patents)

4. Robin Y Ong (2 out of 2 patents)

5. Allan P Henderson (1 out of 27 patents)

6. Bryan Clark (1 out of 17 patents)

7. Irvine W Wei (1 out of 1 patent)

22 patents: Sort by Forward Citations

1. 7910250 - System and method for recharging a metal-air converter used for vehicle propulsion (2011-03-22),

2. 7311986 - Multi-function energy system operable as a fuel cell, reformer, or thermal plant (2007-12-25),

3. 7140328 - Miniature vaporizers for use with chemical converters and energy devices (2006-11-28),

4. 6782667 - Tilt-up and telescopic support tower for large structures (2004-08-31),

5. 6649289 - Fuel cell power supply system (2003-11-18),

6. 6522471 - System of beam narrowing for resolution enhancement and method therefor (2003-02-18),

7. 6458477 - Fuel cell stacks for ultra-high efficiency power systems (2002-10-01),

8. 6380637 - Off-board station and an electricity exchanging system suitable for use with a mobile vehicle power system (2002-04-30),

9. 6183703 - Thermally enhanced compact reformer (2001-02-06),

10. 6083636 - Fuel cell stacks for ultra-high efficiency power systems (2000-07-04),

11. 6054229 - System for electric generation, heating, cooling, and ventilation (2000-04-25),

12. 6024859 - Pressurized integrated electrochemical converter energy system and method (2000-02-15),

13. 5976332 - Ultra-high efficiency turbine and cell combination (1999-11-02),

14. 5948221 - Pressurized, integrated electrochemical converter energy system (1999-09-07),

15. 5858568 - Fuel cell power supply system (1999-01-12),

Ztek Corporation is a leading technology company specializing in cutting-edge software development and IT solutions. With a team of experienced professionals, Ztek provides innovative solutions for businesses looking to stay ahead in the digital age. From custom software development to network security services, Ztek has the expertise to meet the unique needs of each client. Visit our website to learn more about our services and how we can help your business thrive in today's fast-paced technology landscape.

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

Company Badge

USPTO Data Jan 1 1976 - Sep 15 2026

22 Patents

#65 in Waltham, MA

#901 in Massachusetts

#15,001 in US

#28,690 in the World

Waltham, MA, United States of America

Ztek Corporation

Forward Citations = 941

7 inventors:

Michael S Hsu (20 out of 31 patents)

Ethan D Hoag (6 out of 23 patents)

Robin Y P Ong (2 out of 2 patents)

4. Robin Y Ong (2 out of 2 patents)

5. Allan P Henderson (1 out of 27 patents)

Please report any incorrect information to [email protected]

Loading…