Soundproof earcovers

Details Soundproof earcovers Soundproof earcovers

1975-06-25

1977-05-17

Tomsky, Stephen J.

Acoustics

Auditorium

2209, 128152, 181129, A01F 1102, G10K 1104

Patent

active

040236420

ABSTRACT:
A pair of shells filled with foam and ear plugs to cover the ears and exclude all sound.

REFERENCES:
patent: 437602 (1890-09-01), Kaiser
patent: 997673 (1911-07-01), Hegge
patent: 2215198 (1940-09-01), Silbert
patent: 2345842 (1944-04-01), Valentine
patent: 2570675 (1951-10-01), Morris
patent: 2802214 (1957-08-01), Hanks
patent: 2883671 (1959-04-01), Hornickel
patent: 3016054 (1962-01-01), Rosenblatt
patent: 3321041 (1967-05-01), Bowen, Jr.

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