General Magnetics - EHF - 2000s - Asia
General Magnetics is an engimatic brand.
If you look at the That's Suono and some later Denon and Philips / PDM, you'll recognize the cases as ones that General Magnetics made.
From what we can tell, they also made the "infamous" Maxwell LN homage cassettes.
Actually finding their own branded cassettes isn't common. Look on eBay for them, you'll probably get zero hits.
These are really for the collectors. They look good, they sound very decent (from biasing an levelling calibration, these seem like BASF tape or at least an "homage" formulation) but if you just want to record on them, you can get similar performance for less from the likes of a BASF Ferro Extra.