Growing community of inventors

Littleton, MA, United States of America

Robert H Hofeldt

Average Co-Inventor Count = 2.12

ph-index = 6

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 = 79

Robert H HofeldtCharles A Billings (2 patents)Robert H HofeldtStephen A White (2 patents)Robert H HofeldtAlbert J Hofeldt (1 patent)Robert H HofeldtDavid A Gibbs (1 patent)Robert H HofeldtSteven A White (1 patent)Robert H HofeldtRobert H Hofeldt (6 patents)Charles A BillingsCharles A Billings (6 patents)Stephen A WhiteStephen A White (3 patents)Albert J HofeldtAlbert J Hofeldt (17 patents)David A GibbsDavid A Gibbs (8 patents)Steven A WhiteSteven A White (7 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. W. R. Grace Co.-conn. (3 from 1,391 patents)

2. W. R. Grace Co. (2 from 853 patents)

3. Other (1 from 832,718 patents)


6 patents:

1. 9017222 - Machine for testing and training jumping and reaching ability

2. 5227411 - Sealed containers and sealing compositions for them

3. 5204389 - Sealed containers and sealing compositions for them

4. 5106886 - Sealed containers and sealing compositions for them

5. 4485192 - Plastisol sealing gaskets puffed with hollow discrete spheres

6. 4278718 - Sealing compositions for minimizing soluble iron migration

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as of
12/15/2025
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