Growing community of inventors

Los Gatos, CA, United States of America

Robert Z Langevin

Average Co-Inventor Count = 3.00

ph-index = 2

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 = 23

Robert Z LangevinGeorge D Rehklau (2 patents)Robert Z LangevinLee A Cotterill (2 patents)Robert Z LangevinRobert Z Langevin (2 patents)George D RehklauGeorge D Rehklau (5 patents)Lee A CotterillLee A Cotterill (4 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Electro-sound, Inc. (2 from 6 patents)


2 patents:

1. 4589608 - Cassette loading apparatus

2. 4512527 - Cassette loading apparatus

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as of
12/10/2025
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