Dual element headphone
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 29, 1983
Grant Date -
N/A
app pub date -
Dec 11, 1981
filing date -
Dec 11, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A stereophone includes cup assemblies which are supported over the ears of a user by a headband. Each cup assembly includes a piezoelectric acoustic transducer and a dynamic acoustic transducer. The reproduction of the entire audio spectrum is divided between the two transducers at a crossover frequency which is established by an acoustic filter.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully