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For the Inventor, By the Inventor

Orono, MN, United States of America

Dennis T Grendahl

USPTO Granted Patents = 21

Average Co-Inventor Count = 1.1

ph-index = 15

Forward Citations = 1,531(Granted Patents)


Location History:

  • Santa Barbara, CA (US) (1985)
  • Medicine Lake, MN (US) (1985 - 1986)
  • Excelsior, MN (US) (1987 - 1988)
  • Orono, MN (US) (1986 - 1996)

Company Filing History:

goldMedal5 out of 13 
 
Surgidev Corporation
 patents
silverMedal16 out of 832,912 
Other
 patents

Years Active: 1985-1996

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21 patents (USPTO):Explore Patents
1. 5509903 - Syringe having a flexible collar (1996-04-23),
2. 5213721 - Process of making a member with holes (1993-05-25),
3. 4921496 - Radially segemented zone of focus artificial hydrogel lens (1990-05-01),
4. 4919663 - Laminated zone of focus artificial hydrogel lens (1990-04-24),
5. 4906246 - Cylindrically segmented zone of focus artificial hydrogel lens (1990-03-06),
6. 4906245 - Multiple element zone of focus artificial hydrogel lens (1990-03-06),
7. 4798609 - Radially segmented zone of focus artificial lens (1989-01-17),
8. 4798608 - Laminated zone of focus artificial lens (1989-01-17),
9. 4795462 - Cylindrically segmented zone of focus artificial lens (1989-01-03),
10. 4787903 - Intraocular lens (1988-11-29),
11. 4781717 - Intraocular lens (1988-11-01),
12. 4778462 - Multiple element zone of focus artificial lens (1988-10-18),
13. 4774036 - Method of making an intraocular lens (1988-09-27),
14. 4764169 - Intraocular lens (1988-08-16),
15. 4759762 - Accommodating lens (1988-07-26),

Title: Innovations and Contributions of Dennis T. Grendahl

Introduction: Dennis T. Grendahl, based in Orono, MN, is a prolific inventor with an impressive portfolio comprising 21 patents. His innovative work spans various fields, showcasing his ability to solve complex problems through creative solutions.

Latest Patents: Among his latest patents, Grendahl has developed a groundbreaking syringe featuring a flexible collar. This invention comprises a substantially rigid, hollow syringe body, a plunger, and a grip that conforms to the user’s fingers, enhancing usability and comfort. Another notable patent focuses on a process for making a member with holes, utilizing materials such as polymethylmethacrylate and polysulfone. This member is characterized by a series of holes arranged in a predetermined geometrical pattern, derived from a repetitive drawing process. The innovative structure can serve multiple applications, including contacts lenses and medical filters, highlighting Grendahl's versatility in the field of medical devices.

Career Highlights: Grendahl's career includes substantial contributions while working with various organizations. He has a reputation for innovative thinking and practical engineering solutions, making him a valuable asset in any team. Some of the esteemed companies where he has contributed significantly include Surgidev Corporation, where his work continues to impact the medical device industry positively.

Collaborations: Throughout his career, Dennis has collaborated with notable professionals such as William LeMaster and Fritz D. Harnsberger. These partnerships have undoubtedly enriched his work, fostering a collaborative approach to innovation and enabling the development of successful patentable inventions.

Conclusion: Dennis T. Grendahl's contributions to innovation are evident through his numerous patents and collaborations. His dedication to developing practical solutions and improving medical devices showcases his role as a significant figure in the field of invention, inspiring future generations of inventors.

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