I'm sorry for her, but why do you think she's entitled to eternal earnings over this invention? When husbands die, the widow is lucky if they left behind saving

I'm sorry for her, but why do you think she's entitled to eternal earnings over this invention? When husbands die, the widow is lucky if they left behind savings and some real estate - that's what one should expect. If this invention is so good, the original Curtis could have used his earnings at the time to buy other durable assets instead of expecting the invention to be giving dividends forever. Let's remember that every invention builds on top of many other invention that are leveraged free of cost (like the transistor in this case).