Japanese Patent Search: Machinery
Project duration: 4 weeks
Client: A patent law firm in the US
Type of search: Invalidation search, to uncover prior art by search Japanese patent documents to invalidate an EPO patent
Field of Technology: Machinery
Brief Description of the Target Patent to be Invalidated: The target patent discloses an electromagnetic brake system that has a compression spring, an armature disk, a brake disk, and a coil. The target patent was filed in 1999.
After a thoroughreviewing for the target patent, we believe the likelihood of uncovering good art in a Japanese patent search is higher than that in a non-patent literature search, so we recommend the client to search Japanese patent first, to save some search cost and to shorten turnaround time.
Database used: NRI (for full text search), PATOLIS (for classification search), and IPDL (for downloading full patents for review.
1) F-Term and FI (unique Japanese patent classification) search;
2) Full text key word strings and IPC combination search.
About 1540 hits were generated. After reviewing these hits, 3 Japanese patent documents that are pertinent art were uncovered. The electromagnetic brake system disclosed in one of the 3 Japanese patent documents is identical to the system disclosed in the target patent.