Growing community of inventors

Skokie, IL, United States of America

John S O'Callaghan

Average Co-Inventor Count = 6.72

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 = 113

John S O'CallaghanDaniel Gibbons (4 patents)John S O'CallaghanTony S Chan (3 patents)John S O'CallaghanNiren Shah (3 patents)John S O'CallaghanJack Bonn (3 patents)John S O'CallaghanAnn Dawkins (3 patents)John S O'CallaghanK George Rabindran (2 patents)John S O'CallaghanKenneth L Guenther (2 patents)John S O'CallaghanThomas J Faber (2 patents)John S O'CallaghanJoseph Kalika (2 patents)John S O'CallaghanMichael A Wisniewski (2 patents)John S O'CallaghanDavid Fillcicchia (2 patents)John S O'CallaghanMel Kerstein (2 patents)John S O'CallaghanPatrick R Casher (1 patent)John S O'CallaghanWalter S Conard (1 patent)John S O'CallaghanRoy Charles Schoon (1 patent)John S O'CallaghanGeorge Rabindran (1 patent)John S O'CallaghanFredrick Hegland (1 patent)John S O'CallaghanJohn S O'Callaghan (6 patents)Daniel GibbonsDaniel Gibbons (4 patents)Tony S ChanTony S Chan (7 patents)Niren ShahNiren Shah (5 patents)Jack BonnJack Bonn (3 patents)Ann DawkinsAnn Dawkins (3 patents)K George RabindranK George Rabindran (26 patents)Kenneth L GuentherKenneth L Guenther (26 patents)Thomas J FaberThomas J Faber (13 patents)Joseph KalikaJoseph Kalika (9 patents)Michael A WisniewskiMichael A Wisniewski (9 patents)David FillcicchiaDavid Fillcicchia (3 patents)Mel KersteinMel Kerstein (2 patents)Patrick R CasherPatrick R Casher (43 patents)Walter S ConardWalter S Conard (24 patents)Roy Charles SchoonRoy Charles Schoon (7 patents)George RabindranGeorge Rabindran (4 patents)Fredrick HeglandFredrick Hegland (1 patent)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Bell & Howell Postal Systems, Inc. (4 from 13 patents)

2. Bowe Bell + Howell Company (1 from 30 patents)

3. Bowe Bell + Howell Postage Systems Company (1 from 2 patents)


6 patents:

1. 6964367 - Automatic system for verifying articles containing indicia thereon

2. 6949710 - Mail weighing system and scale apparatus

3. 6575358 - Automatic verification equipment

4. 6311892 - Automatic system for verifying articles containing indicia thereon

5. 5934666 - In-feed magazine apparatus and method for loading documents

6. 5829742 - In-feed magazine apparatus and method for loading documents

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as of
12/10/2025
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