Case Studies: Japanese Prior Art Search

Biotech Communication Optical communication
Machinery Electronics Pharmaceutical
Business model Medical Device Computer
Pharmaceutical Biotechnology Semi-conductor

Field: Optical communication

Time and project duration: 3 weeks

Client: A patent law firm in Washington

Search type : Invalidation search, to find Japanese prior art by focusing on Japanese patent search.

Field: optical communication.

Description: The patent to be invalidated relates to a method for determining an optical focus setting and means for setting optical focus.

Database used in the search:

Japanese patent type searched:
Japanese patents, including granted patents, patents that are pending, and unexamined patent applications.

Search strategy:

To cover a relative wide search scope, we utilized a combination of wide classes and key word strings:

A: (2F065LL07+ 2F112AB00+ 2G059LL01+ 2H011+ 2H011BA00+ 2H054BB06+ 5C033MM01) + G03B3/00+ G02B +G01N21/00) (Japanese unique patent classes and IPC)

B: full text search using key word strings combination.

Search results:
About 332 hits were generated in the searches. After downloading full documents of these hits and reviewing all these documents, 3 Japanese prior art were uncovered.


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