Growing community of inventors

Bologna, Italy

Roberto Libbra

Average Co-Inventor Count = 3.00

ph-index = 1

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 = 10

Roberto LibbraFabio Cantieri (2 patents)Roberto LibbraIvan Prestia (1 patent)Roberto LibbraEva Ferrari (1 patent)Roberto LibbraDiego Ferrazzin (1 patent)Roberto LibbraRoberto Libbra (2 patents)Fabio CantieriFabio Cantieri (6 patents)Ivan PrestiaIvan Prestia (25 patents)Eva FerrariEva Ferrari (5 patents)Diego FerrazzinDiego Ferrazzin (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Philip Morris USA Inc. (2 from 734 patents)


2 patents:

1. 9295284 - Apparatus for introducing objects into a smoking article filter

2. 8408215 - Filter making apparatus

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as of
1/17/2026
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