For the Inventor, By the Inventor

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Minneapolis, MN, United States of America

Qualitone Hearing Aids Inc.

USPTO Granted Patents = 2

Forward Citations = 366

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1 inventor (with patents filed for the assignee):

Mas Harada (2 out of 6 patents)

2 patents: Sort by Forward Citations

1. 4375016 - Vented ear tip for hearing aid and adapter coupler therefore (1983-02-22),

2. D267429 - Vented ear tip for hearing aid (1982-12-28),

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USPTO Data Jan 1 1976 - Sep 29 2026

2 Patents

#557 in Minneapolis, MN

#2,526 in Minnesota

#94,730 in US

Minneapolis, MN, United States of America

Qualitone Hearing Aids Inc.

Forward Citations = 366

1 inventor:

Mas Harada (2 out of 6 patents)

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