Wapin Bridge

[Delwin D Fandrich]

----- Original Message ----- 
From: carl meyer <cmpiano@earthlink.net>
To: <pianotech@ptg.org>
Sent: February 16, 2000 11:26 AM
Subject: Re: Wapin Bridge


> Patents can not be renewed.  You can patent an improvement and if your
> improvement is soooo good that the original would be second rate without
> the improvement you've got something. Then you can license the
> improvement to the original inventor.  I remember when Baldwin proudly
> offered PTG members free use of their patented plate mounting methods
> and their accu-hitch pins.  When I looked up these patents I found that
> they had expired many years ago.  Unless its been changed, no!, patents
> are for 17 years and can not be renewed 
> 
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When this permission was initially granted, both patents were in effect.

Del