Growing community of inventors

Orangevale, CA, United States of America

Charles E Preston

Average Co-Inventor Count = 5.27

ph-index = 4

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 = 48

Charles E PrestonMarc J Fagan (6 patents)Charles E PrestonJonathan D Emigh (5 patents)Charles E PrestonRobert L Fehringer (5 patents)Charles E PrestonDaniel M Saldana (4 patents)Charles E PrestonChristian E Tammi (3 patents)Charles E PrestonSteven L Mulkey (2 patents)Charles E PrestonSteve M Johnson (2 patents)Charles E PrestonChris J Jones (2 patents)Charles E PrestonMotaz Qutub (2 patents)Charles E PrestonWilliam L Hines (2 patents)Charles E PrestonBrett J Flickner (1 patent)Charles E PrestonLino E Carnesecca (1 patent)Charles E PrestonDavid L Smart (1 patent)Charles E PrestonCindy M Spear (1 patent)Charles E PrestonRonald T Cabeal (1 patent)Charles E PrestonDavid P Pensa, Jr (1 patent)Charles E PrestonRobert Leitner (1 patent)Charles E PrestonCharles E Preston (7 patents)Marc J FaganMarc J Fagan (10 patents)Jonathan D EmighJonathan D Emigh (25 patents)Robert L FehringerRobert L Fehringer (8 patents)Daniel M SaldanaDaniel M Saldana (7 patents)Christian E TammiChristian E Tammi (4 patents)Steven L MulkeySteven L Mulkey (25 patents)Steve M JohnsonSteve M Johnson (15 patents)Chris J JonesChris J Jones (14 patents)Motaz QutubMotaz Qutub (7 patents)William L HinesWilliam L Hines (4 patents)Brett J FlicknerBrett J Flickner (3 patents)Lino E CarneseccaLino E Carnesecca (3 patents)David L SmartDavid L Smart (2 patents)Cindy M SpearCindy M Spear (2 patents)Ronald T CabealRonald T Cabeal (1 patent)David P Pensa, JrDavid P Pensa, Jr (1 patent)Robert LeitnerRobert Leitner (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Other (5 from 832,680 patents)

2. International Billing Services, Inc. (2 from 8 patents)


7 patents:

1. 6209860 - Billing statement system

2. 5829953 - Billing statement system

3. 5816773 - Collator apparatus

4. 5596861 - System and method for establishing an absolute reference point for an

5. 5568392 - Document edge marking apparatus

6. 5555701 - Envelope wetting and sealing apparatus

7. 5510997 - Dynamic forms and envelopes verification system

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as of
12/6/2025
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