Electronic keyboard instrument

Music – Instruments – Electrical musical tone generation

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C084S177000

Reexamination Certificate

active

08039725

ABSTRACT:
An electronic keyboard instrument that emits sounds in both upward and downward directions from speakers solely for upward sound emission and from speakers solely for downward sound emission to realize acoustics similar to that of acoustic piano, and constitutes rear parts of resonance chambers in a speaker box by a common partition plate to prevent the speaker box from becoming complicated in construction. Woofers directed downward are disposed at a lower part of the speaker box, and squawker directed upward are disposed at an upper part of the speaker box. The internal space of the speaker box is partitioned by one horizontal partition plate into an upper space where resonance chambers for the squawkers are defined by vertical partition plates and a lower space where resonance chambers for the woofers are defined by vertical partition plates. Rear parts of the resonance chambers are constituted by the horizontal partition plate.

REFERENCES:
patent: 5335283 (1994-08-01), Torii
patent: 5789693 (1998-08-01), Lawson
patent: 6392136 (2002-05-01), Kondo et al.
patent: 6888058 (2005-05-01), Urai et al.
patent: 7332669 (2008-02-01), Shadd
patent: 7432428 (2008-10-01), Kunisada et al.
patent: 7678988 (2010-03-01), Sato et al.
patent: 7804017 (2010-09-01), Hata et al.
patent: 2001/0052284 (2001-12-01), Kondo et al.
patent: 2003/0015086 (2003-01-01), Katz
patent: 2005/0150368 (2005-07-01), Izumi et al.
patent: 2007/0017353 (2007-01-01), Kunisada et al.
patent: 2008/0127798 (2008-06-01), Sato et al.
patent: 2009/0241756 (2009-10-01), Tajima et al.
patent: 2010/0166220 (2010-07-01), Okumura
patent: 2010/0192756 (2010-08-01), Kato et al.
patent: 3644356 (2005-04-01), None

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

Electronic keyboard instrument does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electronic keyboard instrument, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electronic keyboard instrument will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-4289262

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