Growing community of inventors

Kingston Upon Thames, United Kingdom

Richard Letham

Average Co-Inventor Count = 6.28

ph-index = 4

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 = 164

Richard Letham ↔ David Aubrey Plumptre (7 patents)Richard Letham ↔ Robert F Veasey (7 patents)Richard Letham ↔ Malcolm Stanley Boyd (7 patents)Richard Letham ↔ James J May (7 patents)Richard Letham ↔ Matthew Meredith Jones (5 patents)Richard Letham ↔ Samuel Ghazaros (5 patents)Richard Letham ↔ James May (0 patent)Richard Letham ↔ Malcom Boyd (0 patent)Richard Letham ↔ James May (0 patent)Richard Letham ↔ Malcom Boyd (0 patent)Richard LethamRichard Letham (7 patents)David Aubrey PlumptreDavid Aubrey Plumptre (197 patents)Robert F VeaseyRobert F Veasey (163 patents)Malcolm Stanley BoydMalcolm Stanley Boyd (117 patents)James J MayJames J May (14 patents)Matthew Meredith JonesMatthew Meredith Jones (78 patents)Samuel GhazarosSamuel Ghazaros (5 patents)James MayJames May (0 patent)Malcom BoydMalcom Boyd (0 patent)James MayJames May (0 patent)Malcom BoydMalcom Boyd (0 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Sanofi-a Ventis Deutschland Gmbh (7 from 1,829 patents)


7 patents:

1. 9855388 - Dosing and drive mechanism for drug delivery device

2. 9078976 - Drive mechanisms suitable for use in drug delivery devices

3. 8915888 - Dosing and drive mechanism for drug delivery device

4. 8771239 - Drive mechanisms suitable for use in drug delivery devices

5. 8226631 - Drive mechanisms suitable for use in drug delivery devices

6. 8167849 - Drive mechanisms suitable for use in drug delivery devices

7. 7993301 - Drive mechanisms suitable for use in drug delivery devices

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as of
12/25/2025
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