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Ralph T Campagna
Putnam, CT
US
5 patents
4 Patents
USD1107687
2025
Sound Attenuator
Unplugs Hearing, Inc.
0 cites
US12501206
2025
Sound Attenuator with Push Button Actuator
Unplugs Hearing, Inc.
0 cites
US12425785
2025
Personal Communication Device
0 cites
US12120488
2024
Personal Sound Amplification Article and Method for Implementing Same
0 cites