Growing community of inventors

Reading, United Kingdom

David John O'Callaghan

Average Co-Inventor Count = 2.67

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 = 179

David John O'CallaghanDaren Mark Howell (3 patents)David John O'CallaghanAndrew Martin Whittingham (3 patents)David John O'CallaghanKevin David Cowley (1 patent)David John O'CallaghanDavid John O'Callaghan (4 patents)Daren Mark HowellDaren Mark Howell (5 patents)Andrew Martin WhittinghamAndrew Martin Whittingham (4 patents)Kevin David CowleyKevin David Cowley (4 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. The Gillette Company (4 from 2,663 patents)


4 patents:

1. 8769825 - Shaving razor including a biasing member producing a progressively increasing cartridge return torque and handle geometry enhancing control during shaving

2. 8732955 - Shaving razor including a biasing member producing a progressively increasing cartridge return torque

3. 8650763 - Shaving razor providing enhanced control during shaving

4. 8306753 - Skin modeling methods and systems

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as of
12/31/2025
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