my understanding is that they have patents for the most basic functions of a modem, thus no other company can build their own without stepping on some toes. It's like they have the patent for a tire and everyone else is welcomed to design their own cars so long as it has no tires on it
correct.
but, when this situation occurs, and would cause other companies to not be able to make or sell products, then that company that owns those patents is required by law to make available for sale that product to other companies
at a fair and resonable price.
thus, in my post i mentioned that because of the fact that apple and qualcomm were in fact able to make a deal for apple to buy modems, the government couldn't prosecute qualcomm as a monopoly.
if however, apple and qualcomm could not agree on a price for apple to purchase at, then a lawsuit accusing qualcomm of being a monopoly would have occurred.
in this case, apple was between a rock and a hard place.
to use your analogy, it really needed those tires. and couldn't take the risk of a long protracted lawsuit since apple does need those modems. so it agreed to a price with qualcomm.
apple didn't go that route with massimo for blood oxygen device related patents. they decided to fight it out in court, and lost big time.
according to massimo, apple never even once contacted massimo. therefore massimo would never be called a monoplpoy since apple never even tried to negotiate a price to use their patents.