[time-nuts] WWVB BPSK patent status
alex at pcscons.com
Fri Aug 8 20:33:23 EDT 2014
there was a Swiss ingenieur who designed and published a receiver design
for the DCF77 which has the same modulation format, also there was a
Finish design a few years ego also published, therefore, that American
company, which is promising the chip for a while but instead delivering
the chip changes it's name... has to be very careful with patent writing.
On 8/8/2014 4:44 PM, Richard (Rick) Karlquist wrote:
> Without having seen the specific patent, what
> worries me is that there is a trend these days
> to write blanket patents that say you can't
> build any black box that, for example, receives
> this format, no matter how it works.
> They don't have to prove what is
> in your FPGA code. They then can shut down any
> competition with such a weak patent unless the
> competition has deep pockets for a lawyer. If
> they can prove you willfully infringed (whatever
> that means), they get triple damages. If you
> do any kind of patent search, do not keep any
> records or tell anyone about it.
> Possibly you could make the FPGA code available
> on the internet and have the end user be the
> infringer. Not being a lawyer, I'm not sure
> if this would get you off the hook. Maybe
> they can hang their hat on the digital copyright
> law (DCMA?) , in which case you become a criminal too.
> Rick Karlquist N6RK
> On 8/8/2014 3:24 PM, Brooke Clarke wrote:
>> Hi Mike:
>> Do you have any patent numbers.
>> Have Fun,
>> Brooke Clarke
>> Mike Harpe wrote:
>>> >From my reading of the archives and research it appears that the
>>> design for
>>> a BPSK WWVB receiver probably has a patent conflict.
>>> Isn't this a rehash of the old Heathkit patent on radio clocks that
>>> back their adoption for years?
>>> I have begun work on a BPSK receiver for WWVB using an FPGA.
>>> Someone should look into why the NIST did this at all since the
>>> design got a patent slapped on it right away.
>>> Mike Harpe, N4PLE
>>> Sellersburg, IN
>>> time-nuts mailing list -- time-nuts at febo.com
>>> To unsubscribe, go to
>>> and follow the instructions there.
>> time-nuts mailing list -- time-nuts at febo.com
>> To unsubscribe, go to
>> and follow the instructions there.
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to
> and follow the instructions there.
More information about the time-nuts