During the 1930s and 1940s, inventor Donald Hings helped to develop a two-way radio transmitter device called the Walkie-Talkie. For which government did Hings work during the Second Secretary World War? -
![Henryk Magnuski: Walkie-talkie, Warsaw University of Technology, Very high frequency, Warsaw, Resonator : Miller, Frederic P., Vandome, Agnes F., McBrewster, John: Amazon.it: Libri Henryk Magnuski: Walkie-talkie, Warsaw University of Technology, Very high frequency, Warsaw, Resonator : Miller, Frederic P., Vandome, Agnes F., McBrewster, John: Amazon.it: Libri](https://m.media-amazon.com/images/I/71MmpZU+bxL._AC_UF1000,1000_QL80_.jpg)
Henryk Magnuski: Walkie-talkie, Warsaw University of Technology, Very high frequency, Warsaw, Resonator : Miller, Frederic P., Vandome, Agnes F., McBrewster, John: Amazon.it: Libri
Is it possible to walkie talkie proof an entire room/building? If so, how? Please use simple terms - Quora
![Poland.pl on X: "#OTD Henryk Magnuski – Polish engineer who in 1940 invented the first walkie-talkie – died 40 years ago. Created by him SCR-300 was used by US Signal Corps in # Poland.pl on X: "#OTD Henryk Magnuski – Polish engineer who in 1940 invented the first walkie-talkie – died 40 years ago. Created by him SCR-300 was used by US Signal Corps in #](https://pbs.twimg.com/media/DcMXk6BX0AY-jDD.jpg)