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my grandfather invented the first automated tea bag machine

Isn't there royalties insued by the inventors family if the patent is re-purchased? It seems The National Tea Company , not in existence, still owes my family money.
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Paten for Product Expired - can I get formulation of product?

A patent for a hair growing product has expired due to non payment of maintenance fees. Is the exact formuation of the product now available? If it's in the public domain - what does that Mean? Do I ...
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106 views

Design or utility patent? Do I need to file multiple variations to protect my idea? Do I need create an exact working example of my idea? and more

If I wanted to produce sticky fore-arm straps that wrap around the fore-arms for competitors to use in the worlds-strongest-man competition to get a better grip when they pick up big circular stones ...
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205 views

Can I file a patent for a new derivative of CHESS

I have an idea for a new derivative of chess. Its very different board game. With the movement logics modified. Though the winning is still the same (the king's death) and also the horse's move is ...
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Patent #6108955 references cited [duplicate]

When i look up patent #6108955 on the uspto site it says it is expired due to the maintenance fees not being paid. there is also a list of references cited. They seem to be similar to #6108955 but ...