Growing community of inventors

Richmond, CA, United States of America

Holger Janssen

Average Co-Inventor Count = 1.50

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 = 73

Holger JanssenGary Louie (2 patents)Holger JanssenJames Dury (2 patents)Holger JanssenSean Wong (2 patents)Holger JanssenSukhdeep Singh Hundal (1 patent)Holger JanssenGary Rogalski (1 patent)Holger JanssenReza Ahmadian Yazdi (1 patent)Holger JanssenKenny Veng Hong Che (1 patent)Holger JanssenSteve Kropp (1 patent)Holger JanssenAlec Ho (1 patent)Holger JanssenStephen R Whitesell (1 patent)Holger JanssenYat Shu (Damien) Yu (1 patent)Holger JanssenIan Liu (1 patent)Holger JanssenHolger Janssen (12 patents)Gary LouieGary Louie (5 patents)James DuryJames Dury (4 patents)Sean WongSean Wong (2 patents)Sukhdeep Singh HundalSukhdeep Singh Hundal (50 patents)Gary RogalskiGary Rogalski (11 patents)Reza Ahmadian YazdiReza Ahmadian Yazdi (5 patents)Kenny Veng Hong CheKenny Veng Hong Che (3 patents)Steve KroppSteve Kropp (1 patent)Alec HoAlec Ho (1 patent)Stephen R WhitesellStephen R Whitesell (1 patent)Yat Shu (Damien) YuYat Shu (Damien) Yu (1 patent)Ian LiuIan Liu (1 patent)
..
Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Vtech Telecommunications Limited (10 from 90 patents)

2. Other (1 from 832,718 patents)

3. Vtech Communications Limited (1 from 63 patents)


12 patents:

1. 9954999 - System and method for telephone operation in quiet mode

2. 9137351 - System and method for telephone operation in quiet mode

3. 8331931 - System and method for cordless handset registration

4. 8213595 - System and method to adjust caller ID information

5. 7856088 - System and method for integrating heterogeneous telephone mailboxes

6. 7474744 - System and method for providing a local time of far end on telephone systems

7. 7397908 - System and method for telephone operation in quiet mode

8. 7363045 - Systems and methods for exchanging data and audio between cellular telephones and landline telephones

9. 6983144 - Telephone base unit having dynamically configurable software

10. 6950652 - Remote management of an external phonebook

11. 6937854 - Apparatus for conducting a conference call between a wireless line and a land line using customer premise equipment

12. 6758690 - Electrostatic discharge protection shield device

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as of
12/13/2025
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