Case Studies: Japanese Prior Art Search

Biotech Communication Optical communication
Machinery Electronics Pharmaceutical
Business model Medical Device Computer
Pharmaceutical Biotechnology Semi-conductor
Field: Computer hardware. Invalidation Search

Client: A major patent law firm in the US

Type of Search: Invalidation search, to search Japanese prior art to invalidate a US patent

Field of Technology: Computer hardware

Brief Description of the Target Patent to be Invalidated: The invention disclosed in the target patent relates to electrical circuits for computers. The target patent was filed in Feb. 1994, with a priority date of July 1992.

Search Strategy: Search both Japanese patents and non-patent literature. In Japanese patent search, classification search (FT and FI) was used. Also, wide IPC with combination of full text search was performed. In the Japanese non-patent literature search, 3 sets of key word strings were used in the inclusive searches. JSTPlus, J-Stage and CiNii were used in the NPL searches.

Result: 6 Japanese patent documents that are considered to be relevant art were identified. Machine translation of the 6 prior art as reference materials were provided to the client for a further review. 3 out of the 6 Japanese prior art were considered to be documents of particularly pertinent after reviewing the machine translation by the client, and were human-translated upon the request of this client.



Thank you kindly for the speedy delivery. I will be sure to advise the client of your remarks regarding the translation. I will also make sure that the reviewer has this information available. I can’t say thank you enough. You have done a great job.

- John Hall, Texas
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