| 20 June 2012 | “Singapore International Water Week 2012 Water Expo” |
| 25 May 2011 | "intelligent DIGITAL" Ultrasonic Flowmeter UFW-100 |
| 16 November 2009 | Announcement of Business and Capital Alliance between TOKYO KEIKI INC. and OVAL CORPORATION [PDF] |
| 14 April 2009 | Ultrasonic Flowmeter UFL-30 |
| 9 March 2009 | Portable Ultrasonic Flowmeter UFP-20 |