This from another list;
I read the MTH Patent this morning and the NMRA DCC RP's this afternoon. I am not a lawyer but I have some practical experience in IP rights etc. And after the past few days I decided I would add my unqualified analysis to the pool (or is it a swamp). I am also sending this to the three lists where I have seen discussion on this topic. So apologies for duplicate posts.
It appears that MTH have somewhat taken advantage of an environment that was developing through invention outside of the world of patents. Their patent is quite fair but it has a lot to do with stuff that was being hypothesized in the model railway press in the mid-1980's in regard to the future of train control. Some of the stuff the patent discusses is built in to what MTH sell into their O gauge market but I would suggest there remains a degree of science fiction in the patent as well - even if it is near to reality.
So what have they patented?
It seems on my reading that they have patented the following in general enough terms to prevent anyone else from ever doing it without infringing upon the patent within the USA: - bi directional communication between control interface and decoders. - the concept of an accessory decoder for control or animation of stationary layout items. - the use of back EMF to control: - train speed under load or no-load (on a grade going up hill or down) - to control the loudness of steam chuff - to synchronize a smoke generator (more smoke under load etc) - user downloadable sounds to a decoder - remotely controlling a coupler to open and close - a method of creating a Doppler effect on a locomotive sound system - full duplex wireless and infra-red remote control of digital command systems - definition of a broad spectrum packet system to transmit between command station and locomotive. - doing all of the above over an AC track environment (such as Lionel) - capability of the digital control system to support legacy train operation - programming a sequence of commands to automate layout operation of a digital system. - and....connecting a computer to manage a digital control system via an RS232 interface!
So what is not covered by the patent?
What is termed "existing art" predates the patent, is covered by other patents held variously by other people (including some of the same people that got this patent) and the likes of Marklin, Lenz, Mark G (of CTC-16 and EasyDCC fame) and others.
The patent is only good in the USA (it does not claim any international jurisdiction).
DCC technology up to 1996 or 2000 (time of the patent) seems to qualify as "existing art".
Uncoupling the way that the Tony's train exchange does it is not within the scope of the patent.
High frequency decoders (good for high end motors) should also be okay.
Believe it or not synchronized diesel sounds based on feedback were not mentioned from what I recalled. It only referred to its us with steam chuff sounds!
If any of the items claimed where available from a US manufacturer or authorized importer prior to the date the MTH patent was filed, then they will cause that part of the patent to be invalidated. But the way the patent is so broadly crafted other aspects should still stand. For example MTH's uncoupling design is quite explicit and in a few years should even be possible in HO scale. And the concept of transmitting external sound to the locomotive as part of the data packet would also stand up to scrutiny.
Who is impacted by the patent?
Any DCC manufacturer or brand available in the USA offering a full duplex remote wireless throttle! NCE guys take note here. EasyDCC is a one-way signal so differs from the wireless technology defined in the patent.
Anyone's plans for bi-directional communications over DCC. The patent is so broad in it's definition it may cover everything that Digitrax, Lenz and the NMRA have been contemplating.
Soundtraxx's Tsunami and Surroundtraxx both seem to do things that the MTH patent seems to claim.
Connecting a computer to your DCC system via an RS232 interface for the purpose of controlling the layout is also claimed, although I am sure this would fail to stand if tested. However connecting your computing device (could even be a PDA) to a non-RS232 serial interface or into the DCC throttle bus is not covered by the patent. And if you are connecting to program the decoder as many of us do that too seems to be outside the scope of the patent.
The claim in regard to Accessory Decoders is a bit surprising because Marklin and Zero One had accessory decoders and predate the patent. So I believe this claim is faulty as well.
If you had any thought of synchronized smoke for your steam locomotives - get read to pay a royalty to MTH.
My conclusion:::: These guys drafted something wide ranging based upon what we all saw as being in the near future! They are attempting to capitalize on the good intentions of others and to profit significantly from a generational change in our hobby. More so they have attempted to claim some IP right to the implementation of these technologies in other hobbies such as Model Aircraft and Model Cars.
MTH has invested some effort in manufacturing products that reflect functions as defined in the patent. That helps protect their claims to some extent. Their action against QSI is also trying to protect their investment and the rights that Uncle Sam bequeathed them with the granting of the patent.
So what might we do about it? Soundtraxx's, Digitrax and QSI could move to Canada. And we can all start ordering by mail order for personal use..... AND/OR Pray that a Model Railroading lawyer with patent skills is getting his teeth into this Pro Bono or for a modest fee. I am sure there must be one or two out there.
This is just another example of where the rules we create as a society to protect ourselves, are being used against us. Or that is the way it appears to me.
It goes down with people who are trying to patent DNA proteins and international electronic financial transactions. It is as dramatic and nefarious as the UP's "Grand Mobilier" of the 1860's!