Ranking Year:
# | Company Name | Region | Tech Topics | Total |
|---|
1 | Avg patent value: 3.43 M | |||
2 | Avg patent value: 62,000 | |||
3 | Avg patent value: 46,000 | |||
4 | Avg patent value: 0 | |||
5 | Avg patent value: 0 |
Top 5 Key Players companies in Keratometer
by Highest Patent Value in the Japan in 2022
The Keratometer top 5 is Discovery PatSnap’ annual ranking of the top 5 Highest Patent Value Keratometer Key Players in the Japan. Discovery has identified the top key players, startups & unicorns, fast-growings, news entrants in 2022, ranking from differnt perspectives, including patent filing intensity, academic research capability, news media heat. The company list is generated from various data types.
A keratometer, also known as an ophthalmometer, is a diagnostic instrument for measuring the curvature of the anterior surface of the cornea, particularly for assessing the extent and axis of astigmatism. It was invented by the German physiologist Hermann von Helmholtz in 1851, although an earlier model was developed in 1796 by Jesse Ramsden and Everard Home. A keratometer uses the relationship between object size (O), image size (I), the distance between the reflective surface and the object (d), and the radius of the reflective surface (R).
Page generation time:
Jun 12 2025