The Cottagers had already secured a loan deal for Arsenal's midfield enforcer Emmanuel Frimpong - and bolstered their options further with a trio of deadline day arrivals.
Urby Emanuelson arrived from AC Milan on a deal that runs until the end of the season and Stanislav Manolev from PSV Eindhoven and Ajax's Eyong Enoh also signed on for the Londoners.
Jol said: "It was a tough month for a lot of clubs, but in the end I feel, although it was not easy, we were quite satisfied.
"We had a few targets, a few positions we wanted to strengthen - on the left and defensive midfield - and in the end it came off so I was quite happy.
"My first choice target was probably Fernando Gago from Real Madrid because they wanted to get rid of him, but we couldn't get that sort of quality. But I had a few options and we went for a few players.
"Urby Emanuelson is a player I know well, comes from AC Milan and is no mug so I was quite happy to get him.
"I was talking to a player from my old club Spurs, Tom Huddlestone, but that didn't come off and Enoh was here already because you can't bet on one horse.
"Huddlestone was very close. They pulled out at the last moment so I was very happy Enoh was in the building and there was no damage done."
Jol must now decide which new boys to throw straight into his squad for Saturday's showdown with United at Craven Cottage.