The amount of people that get personally attached to their roombas is quite considerable. Assigning them names and personalities is common. Generally the helpless little goofball that gets stuck on things periodically personality is endearing.
iRobot had to change their repair workflow because their original plan was to minimize turnaround by having a pool of refurbished roombas, so they could send working ones out of the pool while repairing incoming ones.
Customers were like "wtf I want MY roomba" and were willing to eat long delays.
You are looking at it the wrong way. The vacuum cleaners have the same personality as you. You are original and they just want to imitate.
Besides, your manufacture date is long before theirs. Any patents on your personality are probably expired by this point. Welcome to the public domain, friend!