ZL.201420792331.9 was invalidated by LISENG, banning the patentee from infringement assertion

Recently, the State Intellectual Property Office issued the No. 5W127255 invalidation decision, declaring that all the claims in the patent involved were invalidated, and Liseng IP Attorneys won the invalidation lawsuit on behalf of the client.

 

 

Utility model patent ZL.201420792331.9 relates to an outdoor unit of air conditioning, which is mainly used in the field of air conditioning field to solve the problem of poor heat exchange efficiency of outdoor unit of air conditioning. In the outdoor unit of the air conditioner, because the fan system includes at least two fans set sequentially and coaxial line, the wind pressure blowing from the air outlet will increase significantly when used, which can reduce the air volume loss when the wind passes through the grille, and then ensure the heat exchange efficiency of the outdoor unit of the air conditioner.

 

Based on this case, LISENG conducted a targeted search for the patent, and a detailed discussion was performed with the client, and finally the following evidences were used for this invalidation:

 

 

 

When judging the inventive step, it is first necessary to compare the characteristics of the technical solution of the claim and the closest prior art and find out the distinguishing technical features, and then examine whether the prior art is given, and apply the above distinguishing technical features to the closest prior art to solve the technical problem of its enlightenment, if such enlightenment exists, the technical solution of the claim is obvious relative to the prior art.

 

The case was invalidated based on evidence 1 in combination with evidence 3 and prior art commonly known in the art, or evidence 3 and 4 in combination with common knowledge known in the art.