Об­ра­зуй­те от слова INVENT од­но­ко­рен­ное слово так, чтобы оно грам­ма­ти­че­ски и лек­си­че­ски со­от­вет­ство­ва­ло со­дер­жа­нию тек­ста.

Pavel Yablochkov was a Russian electrical engineer and businessman. He was also the __________________ of the Yablochkov candle  — a type of electric carbon arc lamp  — and the transformer. A Yablochkov candle was much easier to use than other kinds of lamps.