Xav, funk-tastic donut xov tooj, xov tooj thaum ntxov, xov tooj tswm ciab, lub rooj muag xov tooj Askiv tiag, lub tuam txhab xov tooj Tonka Truck thiab txawm tias lub ntiaj teb thawj lub xov tooj tsis muaj xov tooj uas tau tsim nyob ntawm no Seattle !
Thaum twg cov xov tooj cordless tau tsim?
Cordless xov tooj thawj zaug tshwm sim 1980. Cov xov tooj cordless thaum ntxov ua haujlwm ntawm qhov zaus ntawm 27 MHz. Lawv muaj cov teeb meem hauv qab no: qhov txwv.
Thaum twg lub xov tooj wireless hauv tsev tau nrov?
Petkun tau hais tias raws li kev xa ntawv xa mus rau 40,000 tsev neeg ua los ntawm Kev Tshawb Fawb Kev Lag Luam Kev Lag Luam, Chicago kev txhawj xeeb, kev muag khoom ntawm cov xov tooj tsis muaj zog tau nce los ntawm 50,000 xyoo 1980 mus rau me ntsis ntau dua ib lab hauv1982 , nrog 700,000 muag hauv peb lub hlis dhau los ntawm lub xyoo.
thawj lub xov tooj cordless ntau npaum li cas?
Raws li Dataquest, San Jose, Calif. -based electronics research firm, 3 lab cordless phone units tau muag hauv 1983 hauv Teb Chaws Asmeskas ntawm tus nqi nruab nrab ntawm $129. Tab sis xyoo 1984, kev muag khoom poob rau 2.8 lab, ntawm tus nqi nruab nrab ntawm $80.
Thaum twg xov tooj mus wireless?
Lub ntiaj teb thawj zaug kev sib tham hauv xov tooj wireless tau tshwm sim hauv 1880, thaum Alexander Graham Bell thiab Charles Sumner Tainter tau tsim thiab patented lub photophone, ib lub xov tooj uas ua suab sib tham wirelessly dhau modulated teeb beams (uas yog nqaim projections ntawm electromagnetic nthwv dej).
