No, but funding from EI, which is the best type you can get, could be..
I'm not sure I understand this. If you're expectation is that all your funding will come from EI, then yes, it will be a problem. They don't do that. The only point I was making was that on the list of things to worry about, funding shouldn't be near the top: there's plenty of funding available for the right opportunity.
I strongly disagree with this. Large distributor and manufacturer are very risk adverse when it comes to the chance of being sued. Just the threat of legal action can stop a distributor dealing with a potential competitor. We had the same problem when getting a product to market and used the same argument to keep the competition out on another product in the same industry. As the OP’s product will be sold to schools and other educational bodies it is likely that a government body will do the purchasing. They will also be easy to scare by waving a lawyer at them.
OK - point taken. I'd agree in the circumstances you describe, it would be useful OK. My own experience is more international, where trying to stop a US or Chinese company from marketing a product in competition with you on international markets by waving patents at them has little effect.
They are expensive though, and a lot of time and effort can be swallowed up in getting one.
It is also a very tax efficient way of generating income.
Here's where I strongly disagree: patents do not generate income! Getting a patent is a costly business and will have a negative impact on your bottom line. Royalty payments from licensed technology (which may or may not be covered by patents) generates income (as do product sales which incorpotate patented technology). Personally, I'd rather spend time and effort on sales than chasing patents.
I've seen too many cases of people (particularly from academic backgrounds) spending time, effort and cash in getting a patent thinking it's the key to a sucessful business. It's not. It can be a help OK, as in the example you describe, but it's certainly not mandatory and you need very careful evaluation before deciding whether it makes business sense or not.
I'd agree that they are a tax efficient way of collecting revenue, at least for the time being.