Stall with revenge.
Procrastinate in different ways with words.
Delay by legal means.
Use different negotiation levels to delay.
Procrastinate by mourning the soldiers
These are the main strategies.
For details, please refer to two articles written by Dr. Guo of Tsinghua University entitled "Interpreting Patent Dispute Negotiation Strategies from the Experience of Intellectual Property Management in the United States and Taiwan Province Province", which were published in East China Science and Technology 20 13 respectively.