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Oklahoma City, OK, United States of America

Gwen V Janssen

USPTO Granted Patents = 4

Average Co-Inventor Count = 2.0

ph-index = 4

Forward Citations = 149(Granted Patents)

Location History:

Edmond, OK (US) (1983)
Oklahoma City, OK (US) (1987 - 1990)

Company Filing History:

4 out of 832,812

Other

patents

Years Active: 1983-1990

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4 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 4918757 - Hearing aid headband support (1990-04-24),

2. 4881616 - Hearing aid retention apparatus (1989-11-21),

3. 4702345 - Hearing aid retention device (1987-10-27),

4. 4380004 - Emergency sound detector device (1983-04-12),

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