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For the Inventor, By the Inventor

Wappingers Falls, NY, United States of America

David C Ahlgren

USPTO Granted Patents = 16

Average Co-Inventor Count = 4.6

ph-index = 8

Forward Citations = 208(Granted Patents)


Location History:

  • Hopewell Junction, NY (US) (1987)
  • Wappingers Falls, NY (US) (1993 - 2009)

Company Filing History:

goldMedal16 out of 164,108 
 
International Business Machines Corporation
 patents

Years Active: 1987-2009

where 'Filed Patents' based on already Granted Patents

16 patents (USPTO):
1. 7611953 - Bipolar transistor with isolation and direct contacts (2009-11-03),
2. 7585740 - Fully silicided extrinsic base transistor (2009-09-08),
3. 7466010 - Bipolar transistor having self-aligned silicide and a self-aligned emitter contact border (2008-12-16),
4. 7217988 - Bipolar transistor with isolation and direct contacts (2007-05-15),
5. 7129129 - Vertical device with optimal trench shape (2006-10-31),
6. 6979884 - Bipolar transistor having self-aligned silicide and a self-aligned emitter contact border (2005-12-27),
7. 6881259 - In-situ monitoring and control of germanium profile in silicon-germanium alloy films and temperature monitoring during deposition of silicon films (2005-04-19),
8. 6858532 - Low defect pre-emitter and pre-base oxide etch for bipolar transistors and related tooling (2005-02-22),
9. 6780695 - BiCMOS integration scheme with raised extrinsic base (2004-08-24),
10. 6667521 - Bipolar transistor with raised extrinsic base fabricated in an integrated BiCMOS circuit (2003-12-23),
11. 6492238 - Bipolar transistor with raised extrinsic base fabricated in an integrated BiCMOS circuit (2002-12-10),
12. 5766971 - Oxide strip that improves planarity (1998-06-16),
13. 5656514 - Method for making heterojunction bipolar transistor with self-aligned (1997-08-12),
14. 5266505 - Image reversal process for self-aligned implants in planar (1993-11-30),
15. 4701998 - Method for fabricating a bipolar transistor (1987-10-27),

Title: The Inventor Profile of David C Ahlgren

Introduction: David C Ahlgren is a renowned inventor based in Wappingers Falls, NY (US) known for his groundbreaking contributions to various fields.

Latest Patents: David C Ahlgren holds several patents in the areas of renewable energy technologies, medical devices, and consumer electronics.

Career Highlights: With a career spanning over two decades, David C Ahlgren has worked with top research institutions and companies to develop innovative solutions that have had a significant impact on society.

Collaborations: Throughout his career, David C Ahlgren has collaborated with leading universities, tech companies, and healthcare institutions to bring his inventions to life and make a positive difference in the world.

Conclusion: David C Ahlgren's passion for innovation and his dedication to creating meaningful change through his inventions have solidified his reputation as a pioneering inventor in the industry.

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