EC

Elmer V. Carlson

IP Industrial Research Products: 3 patents #1 of 2Top 50%
📍 Prospect Heights, IL: #1 of 16 inventorsTop 7%
🗺 Illinois: #133 of 3,813 inventorsTop 4%
Overall (1989): #10,971 of 140,708Top 8%
3
Patents 1989

Issued Patents 1989

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
4867267 Hearing aid transducer 1989-09-19
4807612 Passive ear protector 1989-02-28
4800982 Cleanable in-the-ear electroacoustic transducer 1989-01-31