From my research I found in 1925 E. Ring Company of Berlin [Germany]produced 2 chainsaws [Erco and Rinco] ,fully portable gas powered chainsaw.And get this the companies 2 salesmen were Andreas Stihl and Emil Lerp [Dolmar founder]
I have travelled through Stuttgart[Stihls home town] a few years back, saw the Mercedes Benz factory, museum. Got to the Stihl factory but just missed a tour of the factory with some Stihl dealers from Cypress, was told if I waited a few days I could catch the next tour.Didn't wait and my wife and I were off to Munich to catch the Ocktoberfest, the Volkfest in Stuttgart was smaller scale but excellent though [didn't touch beer for weeks after LOL] I found out that more patents were drawn up in Stuttgart then any where else in the world even since before the start of the industrial revolution to present times. This was definately an advantage for Stihl.
Referring back to the 1919 Swedish Sector saw[claimed to be the first fully portable gas-powered chainsaw]. A patent was also made in Manitoba Canada in 1919 by a millwright James Shand,a few years before he built a bar and chain powered by a 1 cylinder gas engine driven by a Bowden cable and used it on the job at Manitoba Bridge and Iron Works . I saw James Shands chain patent display about a month ago at the Manitoba Museum Of Man And Nature. In 1919 he promoted 2 working models on the PNW coast of Canada.