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Hillegom, Netherlands

Witteman + Co.

USPTO Granted Patents = 52

Forward Citations = 19

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29 inventors (with patents filed for the assignee):

Jan Verschoor (18 out of 44 patents)

Henricus Gijsbertus Johannes Verduin (4 out of 7 patents)

Cornelius Petrus Franciscus Kools (2 out of 2 patents)

4. Petrus Thomas Damen (2 out of 2 patents)

5. Aart Wijnhout (2 out of 2 patents)

6. Hendrik Jan Van Den Top (1 out of 11 patents)

7. Dick Degenhardt (1 out of 5 patents)

8. Richard Eaton Davis (1 out of 1 patent)

9. Ard Van Klaveren (1 out of 1 patent)

10. Gert Van Buren (1 out of 2 patents)

11. Peter Van Steijn (1 out of 1 patent)

12. Betty Ann Addison (1 out of 1 patent)

13. Cornelis Petrus Maria Van Ostaayen (1 out of 1 patent)

14. Pieter Van Manen (1 out of 1 patent)

15. Hubertus Jozef Maria Vink (1 out of 1 patent)

Core Competencies:

Phlox

Astilbe

Hydrangea

Buddleia

Juniper

Helenium

Veronica

Sedum

Camellia

Aconitum

Delphinium

Citrus

52 patents: Sort by Forward Citations

1. PP19968 - Phlox plant named 'Pina Colada' (2009-04-28),

2. PP19953 - Juniper plant named 'Hulsdonk Yellow' (2009-04-21),

3. PP19948 - Chamaecyparis plant named 'Lucas' (2009-04-21),

4. PP19934 - Buddleia plant named 'Stellar Pink' (2009-04-21),

5. PP19813 - Phlox plant named 'Swizzle' (2009-03-10),

6. PP19610 - Phlox plant named 'Watermelon Punch' (2008-12-30),

7. PP19603 - Phlox plant named 'Cosmopolitan' (2008-12-30),

8. PP19600 - Phlox plant named 'Fondant Fancy' (2008-12-30),

9. PP19514 - Phlox plant named 'Purple Kiss' (2008-12-02),

10. PP19183 - Phlox plant named 'Grenadine Dream' (2008-09-09),

11. PP19106 - Astilbe plant named 'To Have and To Hold' (2008-08-19),

12. PP19093 - Astilbe plant named 'Love and Pride' (2008-08-12),

13. PP19092 - Astilbe plant named 'Diamonds and Pearls' (2008-08-12),

14. PP19048 - Phlox plan named 'Grenadine Dream' (2008-07-29),

15. PP19003 - Hosta plant named 'Great Escape' (2008-07-08),

Company Overview

Witteman + Co. is a prominent player in the field of plant breeding, headquartered in Hillegom, Netherlands. The company specializes in the development and cultivation of a diverse range of ornamental plants, including Phlox, Astilbe, Hydrangea, Buddleia, Juniper, Helenium, Veronica, and Sedum. With a focus on innovation and quality, Witteman + Co. aims to enhance the horticultural industry through advanced breeding techniques and a commitment to sustainable practices, contributing to the beauty and diversity of gardens and landscapes worldwide.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

52 Patents

#2 in Hillegom

#158 in Netherlands

#13,571 in the World

Hillegom, Netherlands

Witteman + Co.

Forward Citations = 19

29 inventors:

Jan Verschoor (18 out of 44 patents)

Henricus Gijsbertus Johannes Verduin (4 out of 7 patents)

Cornelius Petrus Franciscus Kools (2 out of 2 patents)

4. Petrus Thomas Damen (2 out of 2 patents)

5. Aart Wijnhout (2 out of 2 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Witteman + Co.. Retrieved from https://idiyas.com/company/witteman-plus-company

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

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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