Got a decent infographic here that I helped to make providing info about the evolution of logos for famous tech companies. Check out logo evolution for companies such as Google, Microsoft, Firefox and Samsung to name a few: via - https://www.viziononline.co.uk/tech-company-logos/
Also the amazing thing with these companies are the amount of wealth they have created for millions of their employees, product users, share holders etc.
Very interesting! Thanks for sharing. One thing that I would like to point out is that the logos did not change dramatically over the decades. You still want your clients to recognize you!