My software implemented process invention includes three entities:

  1. The first business entity providing the data
  2. A second business entity requesting the data
  3. A user, whose data is requested

I can actually narrow this down such that the user isn't involved in the process, but none of the business entities can be eliminated.

My question is: will competitors be able to circumvent the patent by divided infringement?

1 Answer 1


This is usually solvable by claiming techniques. For readers unfamiliar with the problem: for a person/company/other entity to directly infringe a method claim in a patent that entity needs to do all of the steps that are positively recited in some claim. If it is a system claim one entity has to deploy, make, or etc. all of the elements of the system claim.

Very often there are multiple "actors" involved in a method. For one entity to be responsible for "A client requesting a data packet and then a server sending a packet" requires the client and server being owned or operated by a common entity. Often the client and server are separately owned or could be to get around the claim. So instead, write "a client requesting a packet from a server and then the client receiving a packet sent by a server". The server is inferentially claimed; it is not "positively recited". Both of the actual required actions - requesting and receiving, are done by the client.

This can be rewritten so only the server's actions are positively recited. Many well thought out claim sets have a claim of the client's actions, a claim of the server's actions and another of the user's actions.

Will this work for you? "A method of determining a person's hair color comprising (a)transmitting an individual's identity to a remote hair-color server; (b)receiving a data transmission from the hair-color server, the data including a code representing the hair color that the individual had previously supplied to the server."

For next level of strategy -- think about which actor you would rather be able to go after. Does one end have more money? Is one part of it something that could be out of the US but the customer and benefit are in the US? Is infringement easier to detect or prove at one end?

  • Thank you George. In the meantime I also found this article, which says a claim involving multiple entities may be enforceable. Still, I'll try to construct the claims from one entity's perspective.
    – Upinventor
    Jun 13, 2013 at 14:02
  • In that case the Federal Circuit said the companies could be inducing infringement even though no one was directly infringing. In my answer I was careful to say I was addressing "direct infringement". And that case is headed for the Supreme Court.
    – George White
    Jun 13, 2013 at 16:45

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