The logo when the company started in 1985.
In 1992, the logo (top logo) and the logo text (bottom text) was changed a bit. In conjunction with Proton's move to export its car to markets in Europe and Australia, among others, the Proton badge needed to reflect international class and liberalism. (middle and bottom logo)
To incorporate the traits of the tiger and to unify all Proton badges worldwide, Proton introduced a new badge in 2000.
2016 - present
Proton, predominantly reliant on its domestic market, is presently undergoing a transformation process as part of a long-term turnaround plan, with hopes of returning to profitability and regaining an international presence.