Reminds me of blower flaps or certain experimental short take off craft.
I'm not remembering the leading edge design names at the moment, but there is the below.
https://en.wikipedia.org/wiki/Blown_flap
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Blown flaps, or jet flaps, are powered aerodynamic high-lift devices used on the wings of certain aircraft to improve their low-speed flight characteristics. They use air blown through nozzles to shape the airflow over the rear edge of the wing, directing the flow downward to increase the lift coefficient. There are a variety of methods to achieve this airflow, most of which use jet exhaust or high-pressure air bled off of a jet engine's compressor and then redirected to follow the line of trailing-edge flaps.
Internal blown flaps were used on some carrier and land-based fast jets in the 1960s, including the Lockheed F-104, Blackburn Buccaneer and certain versions of the Mikoyan-Gurevich MiG-21.........
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A Buccaneer pictured with the blowing slots visible on the leading edges. The extended flaps are contributing to the coanda airflow over the wing.
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Not the one I was thinking of, but interesting.
Olof Ljungstrom seems to have intended the drawing/sucking force of the aft fan to cause flow over the wing, more akin to the Channel/Custer wing I suspect.
Channel wing
https://en.wikipedia.org/wiki/Channel_wing
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Custer's summary of his invention was that the key to the lift created by a wing is the velocity of the stream of air passing over the wing, not the velocity of the airplane itself: It's the speed of air, not the airspeed!
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Sucks, doesn't blow.
https://www.researchgate.net/figure/...fig4_308028083
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Velocity distribution around the top of a suction channel wing due to the suction Coanda effect
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