Ex.2
1. Holography was invented by Mieczysław Wolfke in 1920.
2. The bulletproof jacket was designed by Jan Szczepanik and Kazimierz Żegleń in 1902.
3. The first Melex was made by The Mielec Aviation Works in 1971.
4. The first Walkie-Talkie was created by Henryk Magnuski in the 1940s.
