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Retracting & rotating main U/C



 
 
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Old January 28th 20, 01:58 PM posted to rec.aviation.soaring
Tango Whisky
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Default Retracting & rotating main U/C

Le mardi 28 janvier 2020 06:20:29 UTC+1, AS a écritÂ*:
On Tuesday, January 28, 2020 at 12:10:26 AM UTC-5, Tango Whisky wrote:
Patents run for 20 years, so anything connected to Grob gliders will have expired long ago.


..... unless they get renewed.

Uli
'AS'


You can't renew a patent after 20 years. It becomes public domain, and that's it.
 




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