This may be unrelated, but it is a pole saw of sorts.
I had 10-15 trees get closer to our house : ) They looked small when I decided not to to clear that far back, had really grown and leaned towards the house. These are oak, cherry and beach that were 50+ feet tall. One was 24 inch dia at the base. I didn't feel comfortable to just cut them down for fear of them hitting the house.
The forest is so dense, I knew I would have trouble with them getting snagged in other trees as well. So I set out the de-limb them first and then cable them so I could control the fall.
"If I just had a pole saw that could reach 30 feet", yea right! Some how I did it. The basics; Attach a chain saw to a 30+ foot pole. use a block a tackle to raise the saw.
There were several iterations but the working combo was a Harbor freight 14 inch electric chain saw. Wood blocks so a pole could be attached. The pole is a combination of 1-1/4 fiberglass poles and chain link fencing top rails, also about 1-1/4 inch. Each pole section has a strong connector with removable pins.
Steps.
1 Google "big Shot sling shot". This allows you to shoot the rope accurately high in the tree.
2 Pull up your block and tackle
3 attach at the chain saw and raise it up cutting lower branches on the way up.
4 because you can swing the long pole, you might have to re-set the block and tackle for better angles.
5 if your a bit crazy, you can actually cut the last branch that you block and tackle is attached too. (just don't cut all the way!!) then lower the saw/pole. Then use the same rope to pull the top out.