Claimed OU circuit of Rosemary Ainslie

[Cloxxki]

It has a WIPO number, so looks like a granted patent to me, too.

The patent is obviosuly rather dated, 1998/1999. Are you aware of significant prior art before 1998 where Back EMF was attemptedly captured using a similar circuit? I suppose it would be your duty to contact its inventor, and WIPO with such information.

If little has been accomplished in real life with such circuits, it's at best costing the patent holders a lot in patent maintainance fees. Within a decade, it will be free for anyone to use.
Or is this a commercial product today?

[S.Roksund]

Cloxxki, thank you for answering to my posting.
I will see what I can do to dig up similar circuits from time before 98/99.
It may take some effort though. I am not aware of a commercial product.
Else -  I agree with you.

To Groundloop;
I guess it is you that must contact me first. My mail is in the profile.

Rgds
SR

[TinselKoala]

Well, I've looked in the USPTO database, and as far as I can tell that is a patent application, not a patent. Certainly Rosemary Ainslie has no US patent in her name that I can find. But when searching for applications the WIPO application comes up.

[ramset]

S.Roksund

You are in good company here ,men of like mind looking for answers.
you mentioned a circuit cop< 2-5
This is not common here ,can you share?
I hope so
Chet

[S.Roksund]

It is good if no patent has been issued.
I will post my electronic schema and a component list - as
well as the measurement methods I have used, here in this forum.
My intention is  that someone (hopefully) will make a replicate and test.
When I get the circuit and measurements confirmed, I will start making
units that can be tested in practice - before I start the production.
If all fails, - well it has been exciting all the way, and I have learnt a lot.
I am leaving to celebrate my mother (98), so no posting until next week.
Rgds
Sigvald