There is a lot of information being thrown around here, some of it correct, some of it wrong and some of it incomplete. Following is not legal advice and you should not rely on it, but here are some general principles.
Regarding who is listed as an inventor on a patent, that is a question of who conceived of the invention, where the invention is what is claimed in one of the patent claims. Hypothetically, if person A (the boss) has an idea, explains it to person B (an employee), and person B creates drawings, prototypes, models, descriptions, etc., it is possible that person A is an inventor and person B is not. It is also possible that person B is a co-inventor with person A. It is also possible that person A is not an inventor at all and only person B is. It is a question of who conceived of what is claimed in the patent. It can be a complicated thing to determine and the focus is specifically on what is claimed. For example, if the claim in a utility patent is directed to specific details of the prototype that person A did not think of, person B may be the sole inventor. If the claim in a design patent is directed to ornamental features of the invention that person A did not think of, then person B is an inventor. If person B merely reduced to practice an idea that person A conceived of, than person A is an inventor and person B is not.
Bottom line is that I would not rely on guesses from anonymous internet posters as to whether you should have been named as an inventor.
The impact of failing to name an inventor can affect a patent's validity if the patent is enforced. However, if the inventors were wrongly named without deceptive intent, it is not that difficult to fix. Everyone will need to agree on who the correct inventors are and appropriate papers can be filed with the Patent Office to name the correct inventors.
Patent ownership is different from patent inventorship. A patent is a property that can be assigned from one party to another. An inventor owns all the rights in his or her patent. However, if an inventor works for a company, usually he or she signed an employment agreement that the company owns patent rights, so the rights are automatically assigned to the company. Even if you didn't sign such an agreement, the company may be within their rights to say that you must now assign your patent rights to the company as a condition of continued employment. (Maybe not; it depends). Also, there may be certain "shop rights" that the company has in the patent to practice the patent even if an inventor refused to assign it. There may also be state statutory law that applies to these ownership issues. By the way, even if you work for a company but come up with something at home, on your own time, unrelated to your work, chances are that the company does not have rights.
Here are some things you could do. Again, this is not legal advice and you are not my client. These are just possible suggestions:
1. Do not post specific details about your situation on this board or in public unless you have thought through the impact of your comments becoming public. General comments, fine.
2. Consider talking to the patent attorney who filed the applications. Tell him or her you are interested to know how he or she decided whom to name as inventors. Do this by a polite phone call or in person meeting. You likely will be asked if you think you should have been named as an inventor and, if so, why. The patent attorney wants to get it right and likely will ask you lots of specific questions about your conception of and contributions to what is in the patent claims. A patent attorney would have no incentive to name the wrong inventors. If you are an inventor, you probably will be asked to sign an assignment.
3. However, keep in mind that the company's patent attorney is not your attorney, most likely The company's patent attorney has a duty to the company and may not have a duty to you. So, if you have concerns about why you were not named as inventor, consider talking to your own patent attorney, not the company's patent attorney.
4. Most attorneys don't know much about patent issues, so if you think you need to talk to your own attorney, I would suggest you talk to a patent attorney, not a general attorney.
5. If you have patent ownership questions, consider talking to your own attorney. This is not legal advice, it is practical advice. Think about your bosses reaction if you say: (a) I am an inventor , (b) I never assigned my rights to the company, (c) therefore I am a patent owner, and (d) I refuse to assign my rights to the company.