Growing community of inventors

Hong Kong, China

Donald Espie Hay

Average Co-Inventor Count = 1.19

ph-index = 12

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 = 431

Donald Espie HayChristopher James Mccaughan Hay (3 patents)Donald Espie HayChristopher Hay (1 patent)Donald Espie HayCham Fung Lai (1 patent)Donald Espie HayWing Shun Vincent Luk (1 patent)Donald Espie HayChristopher James Mccauchan Hay (1 patent)Donald Espie HayDonald Espie Hay (20 patents)Christopher James Mccaughan HayChristopher James Mccaughan Hay (37 patents)Christopher HayChristopher Hay (14 patents)Cham Fung LaiCham Fung Lai (2 patents)Wing Shun Vincent LukWing Shun Vincent Luk (1 patent)Christopher James Mccauchan HayChristopher James Mccauchan Hay (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Hayco Manufacturing Limited (19 from 115 patents)


20 patents:

1. D517758 - Squeegee

2. D501725 - Cleaning implement

3. 6804852 - Brush

4. D482872 - Cleaning implement

5. D475202 - Brush

6. D473117 - Handle for tool

7. D473028 - Squeegee

8. D462179 - Handle

9. D461058 - Brush

10. D448973 - Handle for barbecue utensils

11. D448609 - Handle for barbecue utensil

12. 6287037 - Hand-held cleaning device

13. D445257 - Barbecue utensil

14. 6224283 - Hand-held cleaning device

15. D439055 - Brush head

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idiyas.com
as of
1/10/2026
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