When was the mechanical pencil invented?
system
yantric pencil kaa avishkaar kab kiya gaya tha?
user
18 veen shatabdi ke ant main ek yantric pencil kii tarikhon kaa sabase pehle gyaat udhaaharan or echemes pendorra ke 1791 shipavrek se malbe main khoja gaya tha.1822 main british avishkaarakon jon ishak hockins or sampson mordan ko ek rifilavel lead-dispencing maikenism ke saath ek pencil ke liye jari kiya gaya pehla patent jari kiya gaya tha.agle varsh, mordan ne hockins ke patent adhikaar kharide or gabrial riddle menuphaccharing pencil ke saath ek vyavsaay shuru kiya.unki vyavsaayik saajhedaari 1837 main samaapt ho gai. mordan ne "es. mordan and company" naam ke tahat pencil or anya chaandi kii vastuon kaa utpaadan jari rakhaa jab tak ki kaarkaane ko dwitiya vishwa yuddh main bambaari nahin kii gai.
assistant
<|system|>
</s>
<|user|>
yantric pencil kaa avishkaar kab kiya gaya tha?</s>
<|assistant|>
18 veen shatabdi ke ant main ek yantric pencil kii tarikhon kaa sabase pehle gyaat udhaaharan or echemes pendorra ke 1791 shipavrek se malbe main khoja gaya tha.1822 main british avishkaarakon jon ishak hockins or sampson mordan ko ek rifilavel lead-dispencing maikenism ke saath ek pencil ke liye jari kiya gaya pehla patent jari kiya gaya tha.agle varsh, mordan ne hockins ke patent adhikaar kharide or gabrial riddle menuphaccharing pencil ke saath ek vyavsaay shuru kiya.unki vyavsaayik saajhedaari 1837 main samaapt ho gai. mordan ne "es. mordan and company" naam ke tahat pencil or anya chaandi kii vastuon kaa utpaadan jari rakhaa jab tak ki kaarkaane ko dwitiya vishwa yuddh main bambaari nahin kii gai.</s>
