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Questions tagged [assignment-history]

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How do I get correspondence contacts for any patent? [duplicate]

I was looking at some patent's that may be on conflict or consultation by their holders may be useful. During some of my research, I stumbled onto a loose PDF it has correspondence data listed. How ...
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1answer
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How can we identify the change in Assignments. Is it based on time frame (USPTO update once in a 6 months) or if there is some legal status changes

A US patent is assigned when it is sold to another person. However, I have seen few cases where the assignment was recorded a little later than the public announcement of the transfer (such as a ...
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Is US 4,915,276 A still owned by Ermin Devito?

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?
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Does LEGO own patent US 8,292,744 B2?

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.
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1answer
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US 2,038,852 A (April 1936) - Who was the manufacturer?

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?
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How can I determine the date of a patent sale?

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.
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How big is the US patent market in Virtual Reality patents?

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 ...
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Why are the assignors of a patent not necessarily identical with previous assignees?

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?