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For the Inventor, By the Inventor

Gloucestershire, United Kingdom

Impro Limited


USPTO Granted Patents = 3

Trademarks = 2

Forward Citations = 80

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1 inventor (with patents filed for the assignee):

goldMedal David R James (3 out of 14 patents)


3 patents:

1. 4742588 - Lifting sling (1988-05-10),
2. 4712257 - Invalid hoists (1987-12-15),
3. 4703523 - Invalid hoists (1987-11-03),
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USPTO Data Jan 1 1976 - Sep 29 2026

3 Patents

#18 in Gloucestershire

#4,886 in United Kingdom

Gloucestershire, GB
Gloucestershire, United Kingdom

Impro Limited

Forward Citations = 80

1 inventor:

goldMedal David R James (3 out of 14 patents)

Please report any incorrect information to [email protected]
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