PugJesus@lemmy.worldM to HistoryPorn@lemmy.worldEnglish · 9 months agoThe ISOLATOR, invention from 1925lemmy.worldimagemessage-square36fedilinkarrow-up1281arrow-down15
arrow-up1276arrow-down1imageThe ISOLATOR, invention from 1925lemmy.worldPugJesus@lemmy.worldM to HistoryPorn@lemmy.worldEnglish · 9 months agomessage-square36fedilink
minus-squareMassahud@programming.devlinkfedilinkEnglisharrow-up3·9 months agoThe grandfather of noise canceling headphones.
The grandfather of noise canceling headphones.