Growing community of inventors

Stevenage, United Kingdom

Colin A Leach

Average Co-Inventor Count = 3.10

ph-index = 8

The patent ph-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times.

Forward Citations = 195

Colin A LeachRobert John Ife (16 patents)Colin A LeachThomas H Brown (15 patents)Colin A LeachDavid J Keeling (2 patents)Colin A LeachDashyant Dhanak (1 patent)Colin A LeachColin A Leach (16 patents)Robert John IfeRobert John Ife (63 patents)Thomas H BrownThomas H Brown (55 patents)David J KeelingDavid J Keeling (2 patents)Dashyant DhanakDashyant Dhanak (41 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Smithkline Beckman Intercredit B.v. (6 from 6 patents)

2. Smith Kline & French Laboratories Limited (5 from 362 patents)

3. Smithkline Beecham Intercredit B.v. (5 from 6 patents)


16 patents:

1. 5420135 - Substituted quinoline derivatives

2. 5409943 - [(alkoxy)pyridinyl]amine compounds which are useful in the treatment of

3. 5280026 - Thienopyrimidines

4. 5200417 - Substituted 4-amino-isoquinoline compounds, pharmaceutical composition

5. 5143920 - Substituted 4-aminoquinoline derivatives as gastric secretion inhibitors

6. 5089498 - Substituted 4-aminoquinoline derivatives as gastric acid secretion

7. 5089504 - Substituted 4-aminoquinoline derivatives as gastric acid secretion

8. 5082841 - 3-carbonyl-4-amino-8-substituted quinoline compounds useful in

9. 5082848 - Substituted 4-aminoquinoline derivatives as gastric acid secretion

10. 5064833 - Substituted quinazoline derivatives for use in gastrointestinal diseases

11. 5051508 - Dihydropyrrolo quinoline derivatives

12. 5049567 - Substituted 4-aminoquinazoline derivatives and method of use

13. 5006535 - Substituted heterocylic 4-aminoquinoline derivatives as gastric acid

14. 4935431 - Substituted 7-amino-thienopyridine derivatives as gastric acid secretion

15. 4806550 - 4-Amino-3-carbonyl substituted quinolines as inhibitors of gastric acid

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12/29/2025
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