CP-70/80 patent numbers

[Delwin D Fandrich]

----- Original Message -----
From: "Steven Kruyswijk" <steven@www2.hku.nl>
To: <pianotech@ptg.org>
Sent: May 31, 2003 8:42 AM
Subject: CP-70/80 patent numbers


> Hi all,
>
> I'm a Dutch Audio Design student (and parttime Rhodes technician)
> currently graduating on the subject of the Yamaha CP series
> electro-mechanical pianos.
>
> For my research, I'd really like to read the patents about the
> innovations in the CP pianos at www.uspto.gov, but a search there hasn't
> been very productive. The online original manuals at
> http://www2.yamaha.co.jp/manual/english/index.html weren't much help
> either.

Steven,

You might check on patents issued to The Baldwin Piano & Organ Company. The
Yamaha CP-??? series seems to have been based largely on technology
developed originally by Baldwin for their disastrous Electro-Piano concept.
Brilliant idea, miserable execution.

Del