Growing community of inventors

Gloucester, United Kingdom

Derek J Richards

Average Co-Inventor Count = 1.08

ph-index = 5

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 = 114

Derek J RichardsKaj Stenberg (1 patent)Derek J RichardsDerek J Richards (7 patents)Kaj StenbergKaj Stenberg (1 patent)
..
Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Arjo Limited (4 from 22 patents)

2. Arjo Mecanaids Limited (3 from 3 patents)


7 patents:

1. 5412820 - Invalid hoist with laterally adjustable base

2. 5369821 - Invalid hoist

3. D338059 - Combined bathtub and invalid chair hoist

4. D337443 - Hoist chair

5. 5146638 - Bath

6. 5103509 - Apparatus for assisting physically disabled persons into and out of a

7. 5022106 - Invalid hoists

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as of
12/31/2025
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