10 Steps to Consider Before Filing a Patent Infringement Lawsuit

November 8, 2010

10 Steps to Consider Before Filing a Patent Infringement Lawsuit
© 2010 Frederic M. Douglas. All Rights Reserved. fdouglas@cox.net
Planning to sue someone for infringing your patent? Do you know that if you are not careful in
preparing for your suit, you could end up being ordered to pay the attorney fees of the defendant?
Review these steps and consult an attorney for guidance in relation to your particular facts. No
legal advice provided and no attorney-client relationship created in this publication.
(1) Identify your business goals
Are you seeking money (lost profits, reasonable royalty)? An injunction (court order stopping
infringer from infringing). Do you want to send a message to your competitors? Do you want to
negotiate a license? What can you accomplish before litigation that you cannot do after litigation
(2) Get Analysis of Infringement Issues and Invalidity Issues
Must be in writing. Determine strengths and weaknesses of your patent. Should use independent
law firm (not one taking case) for unbiased assessment. Does defendant have patents on the
product? What are the weaknesses and strengths of those patents?
(3) Determine competitive position of invention
Can defendant easily design around (or redesign) your patent? What are commercial advantages
of the invention? (sales, cost of manufacture, potential for future sales). What are the
products/services that compete with the invention? Does the invention make money “by itself”?
Or is the invention more successful due to marketing, lever from company position, etc.?
(4) Compare Products
If practicing the invention, are you losing or gaining market share? Do consumers like your
product/service? How does your product compare with other products in marketplace? How does
your product compare with defendant’s product?
(5) Damages
Calculate damages. Products marked with patent number? What are your lost profits? What is a
reasonable royalty? Insurance coverage? Advertising injury?
(6) Litigation Costs
Estimate legal fees, costs, experts. Travel (where will you sue?). What is the extent of discovery
to be produced on your side? What kind of discovery do you need from defendant? What is the
litigation personality of the defendant? (“scorched earth”, “settle promptly”, fight some, settle
(7) Size Up the Defendant
Google is not enough. Dun & Bradstreet Previous patent litigation. How important is the product
to defendant? Who are the potential witnesses for the defendant? Did they publish anything? Is
the lawsuit more important for you or the defendant? If you win, will you end up closing down
the company? Will they go BK? Who are their usual litigation attorneys?
(8) Review Your Evidence
Gather all documents. Anticipate documents to be requested by defendant in discovery. (Product
brochures, advertisements, lab notebooks, invention disclosures, patentability searches,
prosecution history). Review patent prosecution attorney’s files. Electronic information?
Interview key witnesses. (Inventor, technicians) Interview likely witnesses. What trade secrets
are likely to be revealed in litigation? Are relevant documents marked as confidential? Is
information kept secure to maintain trade secret protection? Any best mode problems?
(9) Retain Expert Witnesses
Analyze credibility, previous work, publications, Ask expert about defendants’ likely experts
(10) Make a Litigation Plan
Budget for litigation costs. Plan discovery, motions, summary judgment, anticipate defendant’s
likely motions. Identify which aspects of your case pose non-routine issues (e.g., software,
medical procedures, divided infringement, inequitable conduct).