Possibly best tried without referring to anything. Answers in the comments field.
1. An easy one to start with: How many Yasui brothers formed Brother: 2, 4, 6 or 8?
2. Who was Erika?
3. Who was Gabriele?
4. What did May Estella Munson demonstrate at the 1893 Chicago World's Fair-Columbian Exposition?
5. Which company used this lion logo?
6. And this one?
7. Which typewriter has a tiger on it?
8. It's a long tail (sic), so which US and French companies finished up in court over very similar trademarks?
10. And this logo?
11. What did the Frolio 5 become, as made in Bakelite by Optima?
12. Which typewriter became a very fast BMW car?
13. Which typewriter was designed by two renowned sports car designers?
14. Orel is Czech for eagle. So which company made the Orel?
15. It's a US state and an Italian (Swiss-designed) typewriter.
16. "Flying walnut" was the original, jocular working title for what?
17. The "hummingbird" typewriter is the ...?
18. Love from Paris is the English title for a 1957 West German film starring Romy Schneider and Horst Buchholz. Its original title is the Buchholz character name ("my little one") and also that of a rather unusual typewriter.
19. Name three manufacturers which produced Tippas.
20. Name two American brands which used world/globe maps as decals.
21. Name three American brands that used crowns as decals/badges.
22. Which company used a theatre curtain decal?
23. What is the common denominator for H.G.Palmer, Craftamatic, Pinnock, Stott, Pacific, Waverley, Lemair, Hanimex and Waltons?
24. How does one tell a Triumph typewriter logo apart from a Triumph motorcycle logo?
25. And an easy one to finish with: Which typewriter was launched on February 14, 1969?
25. And an easy one to finish with: Which typewriter was launched on February 14, 1969?