The most likely scenario is that XW has a patent pending on technology which
permits the manufacture of a very cheap dependable time-code receiver for
the mass market. Think along the lines of receiver subsystems below $5
(maybe below $1). If there were a market for WWVB timing receivers you would
think somebody would have been making them in the last few decades. There is
nothing keeping anyone from making a receiver using the published signal
characteristics. Because the signal is at a very low frequency and of very
low complexity, It is possible to craft a receiver "the hard way" using well
known (no IP) techniques at what to a hobbyist or time-nut is a very low
cost. Unless you plan to make a wristwatch wall or alarm clock I don't think
you have much to concern yourself with.
Just my $0.02
Dale NV8U
-----Original Message-----
From: J. Forster
Sent: Wednesday, September 26, 2012 10:11 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] WWVB Now a Monopoly
But if someone here designed and built a $100 receiver and offered it to
the group, that could well violate some of their IP.
As to building a home brew receiver and certifying a onsie so your lab's
cal is traceable, I'd certainly not trust a cal done that way.
Doing spacecraft communications is hardly the same thing.
YMMV,
-John
============
On 9/26/12 5:15 PM, Bob Camp wrote:
Hi
Last time I checked, you can build one for your own use and are allowed
to use what ever you want, regardless of it's patent status.
not precisely true..there's some restrictions on that process (e.g. you
can practise an invention in the course of making another invention that
uses it)
But if you build it and don't tell anyone you built it, it would be hard
for you to be sued for infringement.
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