Patent pitfalls ... Can I? Should I? How should I NOT go about it? How do I evaluate law firms? How long will it take? How much will it cost?

The answer: do both. The first thing you need to know about patents is that the U.S. now has a first-inventor-to-file system after the American Invents Act (AIA) went into effect in 2013. I have to disagree with Dan above: for hardware inventions especially, a patent is an important part of the business plan. The first inventor who "races to the patent office" now is typically the winner. This means if you do not file for a patent on your invention, you can lose the rights to your invention much easier than before the AIA. The next step is to think about how a patent fits into your business plan. A patent application is but a tool in your bag when starting up. A crowdsourcing campaign on a site like Indiegogo can validate the idea. But it also puts the idea out to the public and starts the 1-year clock ticking on when you can get a patent. For hardware startups, however, if you're not thinking about a patent upfront -- you're likely leaving a massive amount of your product's value on the table.

SOM refers to the portion of the market that your business COULD actually capture, as you stated: "[the] % [you] can realistically achieve from the SAM." Let's use an analogy to break this down - and pretend you are talking about fishing instead of project management software. TAM refers to all the fish (that manage projects) in the sea. SAM are all the fish (that manage projects) within casting range of the dock you fish from (ie your solution is viable for them). SOM are the number of fish (that manage projects) you can reasonably catch within the amounts of time, energy, and bait you can allocate to fishing. The question within a question you ask about guidelines on believability is a great one. And, while I don't have a guideline or benchmark to share, I can confirm your instinct; ensuring that your projected SOM is reasonable is absolutely critical. The best way to project this is by having at least some of the equation variables grounded in reality - ie, actually catching some fish. If you can show how much it costs to acquire a customer, how much it costs to service that customer, and how much you'll make from that customer over a lifetime, you've got some great empirical evidence to show how you'll achieve growth within your SOM. I don't think of SOM as a target - it is rather the theoretical maximum number of customers or revenue I can achieve within the (sub)universe where my product or service adds value. In the end - the number is important - but not as important as how you present it, and how you'll approach it with your product. As an investor, you want to see more than just the answer - you want the thought process behind the answer. Was the founder thoughtful in their approach, did they look beyond the obvious while remaining pragmatic? Do they understand clearly why the SAM (macro-environment) and SOM (micro-environment) break out of the TAM in the proportions they've listed? More than happy to dive deeper on this.

This is a little hard to answer because it is so vague. It depends on the area, the market and the strength of innovation. I know that The App Guy has a terrific podcast at http://www.theappguy.co/ and is also trying to organize a community for App developers to sell their ideas. Let me know if I can be of further assistance to discuss patentability in terms of its value to getting a sale or license. What ever you do, don't spend money filing a full patent, just a provisional. Good luck.

Here is a link to a basic model - http://monetizepros.com/tools/template-library/subscription-revenue-model-spreadsheet/ Depending on the purpose of the model you could get much much more elaborate or simpler. This base model will help you to understand size of the prize. But if you want to develop an end to end profitability model (Revenue, Gross Margin, Selling & General Administrative Costs, Taxes) I would suggest working with financial analyst. You biggest drivers (inputs) on a SaaS model will be CAC (Customer Acquisition Cost, Average Selling Price / Monthly Plan Cost, Customer Churn(How many people cancel their plans month to month), & Cost to serve If you can nail down them with solid backup data on your assumption that will make thing a lot simpler. Let me know if you need any help. I spent 7 years at a Fortune 100 company as a Sr. Financial Analyst.

First of all, what you have is a provisional patent **application**. For now, the provisional patent application is not publicly available. This can be a big advantage to you. You can use this time to improve your invention and file additional provisional applications. If you don't plan on making/practicing the invention yourself, you should make sure to try to think of everything possible regarding how that invention can be improved. This would (hopefully) come naturally to a practicing inventor. When you file your non-provisional application, your disclosure will be made public ("published") 18 months from the filing of the non-provisional. While your applications are not publicly available, I suggest waiting until you file your non-provisional application(s) to talk to others. Quite often, provisional applications do not have the detail or the scope that the non-provisional will have -- due to the time spent on getting drawings accurate and making sure everything is included in your non-provisional applications. It is best to have a complete application before talking to practicing companies. Sophisticated companies will take advantage of information not disclosed in your provisional application to file their own patent applications. If your applications are not publicly available (or even they are published), you should sign confidentiality agreements (non-disclosure agreements) with anyone you talk to about licensing or buying your invention. Keeping track of who you talked to with confidentiality agreements can be the basis for "notice" of the invention by an infringer -- when they eventually steal your invention. You can sell your idea anytime, but a provisional application is worth a lot less than a non-provisional application which is worth less than an allowed application or issued patent. Provisional applications are generally not as complete as they could be -- and require additional time and finesse to complete the non-provisional application. In terms of appearances, if you are not willing to put in the money to file the non-provisional application, the invention is likely not worth that much money. Companies as well as non-practicing entities may look at provisional applications, but not for long, and will not give you the kind of money that you may get from selling a fully examined patent. Of course, it depends on how good your invention is.