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| Patents for Masafumi Okamoto | |||||
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| Number | Date | Patentee | Title | Type | |
| 7,013,576 | Mar. 21, 2006 | T. Nakamura, M. Tachikake, T. Nakadoi, M. Suzuki, S. Takahashi, O. Saito, Y. Ichikawa, K. Sasaki, S. Hayashida, Y. Hashimoto, M. Okamoto | Measuring Device Using Multi-Start Threaded Spindle | measurement gauges | |