Sign up
Title:
Hearing aid plastic ear pieces
United States Patent 2939923
Inventors:
Henderson, John D.
Application Number:
US52612655A
Publication Date:
06/07/1960
Filing Date:
08/03/1955
Assignee:
Henderson, John D.
Primary Class:
Other Classes:
63/14.1, 381/328
International Classes:
H04R1/10; H04R25/00; H04R25/04
View Patent Images:
US Patent References:
2573132Hearing aid support1951-10-30
2529562Adjustable earpiece for receivers1950-11-14
2521414Adjustable auditory insert1950-09-05
2513746Hearing aid support1950-07-04
2487038Ear insert for earphones1949-11-08
2430229Hearing aid earpiece1947-11-04
2188591Audiphone earpiece1940-01-30