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For the Inventor, By the Inventor

Sunnyvale, CA, United States of America

Pilkington Barnes Hind, Inc.

USPTO Granted Patents = 13

Trademarks = 1

Forward Citations = 703

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14 inventors (with patents filed for the assignee):

goldMedal Hermann H Neidlinger (3 out of 8 patents)

silverMedal Syed Hasan Askari (3 out of 19 patents)

bronzeMedal John M Evans (3 out of 10 patents)

4.  Khushroo Gandhi (2 out of 8 patents)

5.  William E Meyers (2 out of 5 patents)

6.  David Bruce Miller (2 out of 49 patents)

7.  Donald J Ratkowski (2 out of 11 patents)

8.  William J Burke (2 out of 6 patents)

9.  Lisa A Folk (2 out of 3 patents)

10.  Leroy Meshel (2 out of 4 patents)

11.  Joseph Weinschenk (2 out of 2 patents)

12.  Ashok R Thakrar (1 out of 6 patents)

13.  Colin M Perrott (1 out of 4 patents)

14.  Michael H Freeman (1 out of 15 patents)


13 patents:

1. 5786883 - Annular mask contact lenses (1998-07-28),
2. 5771088 - Contact lens designed to accommodate and correct for the effects of (1998-06-23),
3. 5757458 - Annular mask contact lenses (1998-05-26),
4. 5748282 - Multifocal contact lens (1998-05-05),
5. 5713460 - Incorporation of adsorbents during extraction and/or hydration of (1998-02-03),
6. 5629360 - Optically clear polymer compositions containing an interpenetrant (1997-05-13),
7. 5534038 - Tinting hydrogel materials with vat dyes (1996-07-09),
8. 5519069 - Contact lenses and materials and methods of making same (1996-05-21),
9. 5505884 - Contact lenses and materials and methods of making same (1996-04-09),
10. 5498681 - Material for use in the manufacture of polymeric articles (1996-03-12),
11. 5494155 - Incorporation of absorbents during extraction and/or hydration of (1996-02-27),
12. 5482981 - Optically clear polymer compositions containing an interpenetrant (1996-01-09),
13. 5433898 - Method of manufacturing a contact lens (1995-07-18),
Company Overview
Pilkington Barnes Hind, Inc., located in Sunnyvale, California, specializes in advanced optical technologies and precision optics. The company focuses on the development and manufacturing of high-quality ophthalmic lenses and related products, catering to the needs of the vision care industry. With a commitment to innovation, Pilkington Barnes Hind leverages cutting-edge research in optics and materials science to enhance visual performance and comfort for consumers, contributing significantly to advancements in eye care solutions.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 20 2026

13 Patents

#253 in Sunnyvale, CA

#5,661 in California

#23,854 in US

#45,081 in the World

Sunnyvale, CA (US)
Sunnyvale, CA, United States of America

Pilkington Barnes Hind, Inc.

Forward Citations = 703

14 inventors:

goldMedal Hermann H Neidlinger (3 out of 8 patents)

silverMedal Syed Hasan Askari (3 out of 19 patents)

bronzeMedal John M Evans (3 out of 10 patents)

4.  Khushroo Gandhi (2 out of 8 patents)

5.  William E Meyers (2 out of 5 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Pilkington Barnes Hind, Inc.. Retrieved from https://idiyas.com/company/pilkington-barnes-hind

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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