Beware the “on-sale bar”
A patent is invalid if the invention was sold more than a year before filing (on-sale bar), and the recent “Helsinn v … Read more
Patents
35 USC 287: Marking inventions
To avoid damaging your patent rights, mark your products with patent numbers. The law (named 35 USC 287) covers devices but not … Read more
Selling patents
The best way to sell patents is to create a family of commercially useful patents. These should be hard to design around … Read more
Medical procedure patents
Can you patent a medical procedure? Before starting, note that under 35 USC 287(C), US physicians and other medical practitioners have limited … Read more
Patent demand letters
Patent demand letters are stressful. Before responding or ignoring, evaluate infringement, patent prosecution history, ownership, and litigation history.
Patent claim charts
Think that someone is infringing on your patent? Worried you are infringing, or want to show a patent reads on prior art? … Read more