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[aprssig] Need some help searching for a patent...

scott at opentrac.org scott at opentrac.org
Wed Feb 23 14:58:50 UTC 2005


I wonder how this compares to the TigerTrak TM-1...

"For APRSR and some other tracking applications, the TM-1 is inserted
directly in parallel with the microphone. This allows you to use the radio
for voice communications and tracking simultaneously. It also allows the mic
PTT to trigger the tracker at the end of each voice transmission (mic
encoding). Special circuitry in the TigerTrak allows it to "capture" the
microphone input and control PTT operation without the need to "break" ANY
of the mic lines! Other more primitive units require mic lines to be broken
and relays or diodes to be installed to accomplish this. An optional "Mic
Adapter Kit" is also available to simplify attachment to the mic connector"

I'm not sure how much 'special circuitry' that really requires.  It's still
got some bugs, but for the most part I've got an OpenTracker doing that now
with a Motorola GP68.

Scott
N1VG

-----Original Message-----
From: aprssig-bounces at lists.tapr.org
[mailto:aprssig-bounces at lists.tapr.org]On Behalf Of James Washer
Sent: Wednesday, February 23, 2005 6:32 AM
To: TAPR APRS Mailing List
Subject: Re: [aprssig] Need some help searching for a patent...


Here's the response from their engineer.

> G'day Jim,
>
> WARPS is similar to mic-E and the patent relates to detecting PTT position
> without being in line with the mic and the method of seizing control.  We
> are dealing with Motorola "professional" radios and that determined the
> parameters.
>
> WARPS also POLLs over both trunk and PMR networks and we have well
developed
> software interfaces into OziExplorer and MapInfo GIS packages.  Hope this
> helps.
>
> Regards
>
> Mike
>

On Tue, 15 Feb 2005 20:02:11 -0500
John Ackermann N8UR <jra at febo.com> wrote:

> James Washer wrote:
>
> >I wrote them an email, asking for a copy of their patent application.
I'll forward whatever I get back from them to aprssig
> >
> > - jim
> >
>
> As interesting as that would be to see, I strongly doubt they will show
you the application.  Patent applications remain secret until the patent
issues, and there are a bunch of good reasons why you don't want to let
others see your application ahead of the patent issuing.
>
>
> So, though I have my doubts about these folks, don't hold refusal to
> disclose the application (by itself) against them.
>
> John
>
>
> _______________________________________________
> aprssig mailing list
> aprssig at lists.tapr.org
> https://lists.tapr.org/cgi-bin/mailman/listinfo/aprssig
>

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