[time-nuts] WWVB Now a Monopoly
Dale J. Robertson
dale at nap-us.com
Thu Sep 27 03:51:27 UTC 2012
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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