Earpiece, telephone handset and headphone intended to correct in

Telephonic communications – Terminal – Housing or housing component

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

379 52, 379422, 381 682, 381 98, H04R 103, H04R 122, H04R 2500, H03G 502

Patent

active

047649577

ABSTRACT:
An earpiece comprises a suction cup sensor, a preamplifier, a potentiometer for varying the gain of the amplifier, a pass band filter and electronic means enabling the user to adjust the central frequency and/or the width of the pass band of the filter. One application of the invention is the construction of self-contained and individualized telephone handsets or headphones which may be connected without any wire connection on any telephone set.

REFERENCES:
patent: 2167462 (1939-07-01), Rechnitzer
patent: 2186072 (1940-01-01), Huth
patent: 2411190 (1946-11-01), Brown
patent: 2659772 (1953-11-01), O'Hara
patent: 2778889 (1957-01-01), Hausdorf
patent: 3101390 (1963-08-01), Maille
patent: 3784750 (1974-01-01), Stearns et al.
patent: 3818149 (1974-06-01), Stearns et al.
patent: 3849602 (1974-11-01), Gendin
patent: 4119814 (1978-10-01), Harless
patent: 4293937 (1981-10-01), Sharp et al.
patent: 4298970 (1981-11-01), Shawhan et al.
patent: 4320473 (1982-03-01), Smither et al.
patent: 4321680 (1982-03-01), Bertrand et al.
patent: 4489610 (1985-12-01), Slavin
patent: 4596899 (1986-06-01), Wojcik et al.
1981 IEEE International Symposium on Circuits and Systems Proceedings, vol. 1 of 3, Apr. 27-29, 1981, pp. 303-306, Chicago, US; W. Brandenbusch: "Multiple Parameter Tunable Active Integrator Filters".

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Earpiece, telephone handset and headphone intended to correct in does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Earpiece, telephone handset and headphone intended to correct in, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Earpiece, telephone handset and headphone intended to correct in will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-604816

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.