In reference to the patent: US 4,915,276 A Is this patent still owned by Ermin Devito or somebody else? If it is, how can it be re-claimed by him or his family?
In reference to the patent: US 8,292,744 B2 It looks like LEGO so I need to know if they own it or not.
US 2,038,852 A This is a kitchen sink strainer system. How do I find out the manufacturer or supplier of this patent or find out if the product is still manufactured?
My great grandmother Lizzie M. Adams sold her patent (number 680,106) to C. H. Munson in the early 1900s, I think. I have a newspaper article of the sale but no date.
I'm trying to work out how many virtual reality patents are assigned each year, and how the size of the market has changed. I also want to work out how many patents are reassigned each year, and how ...
When I researched the assignment history of a patent I found one assignment (from assignor A to assignee B) and a later assignment (from assignor B and C to assignee D). Where does C come from?