"previously only used" is grammatically correct and can be used in written English.
It is often used to describe something that was used in the past but is no longer used. Example: "The old computer system, previously only used by a select few employees, has now been replaced with a newer and more efficient system."
And it has begun using a methodology previously only used by developing countries, the CAT report found.
VR technology previously only used by psychotherapists to treat clients is now being sold to corporate human resources departments.
If you've got Wii Fit, this is your big chance to have some actual fun with your balance board, previously only used for slightly worthy yoga-style exercises.
Although the "absolute discharge" has always been an option for magistrates it was previously only used in very rare exceptional circumstances.
We demonstrate that cogwheel phase cycling, which was previously only used in solid state NMR, can be applied to optimize the efficiency of commonly used pulse sequences in multiple resonance liquid-state biomolecular NMR.
"Glass is the new brick," says Mark Bonnington, of Glass Design and Build, based in London and Yorkshire "The technology is moving forward all the time and the structural glazing that was previously only used for commercial builds can now be done on a domestic scale".
Dell is now free to let AMD and Intel slug away at each other to woo its business, something that Dell could previously only use as a threat to Intel.
And churches that had previously offered only used clothing or food to the needy began to shift to offering programs more directly involved in forming relationships with the poor, like mentoring and job training.
Because no differences concerning the odours were found previously, we only used octanol as CS+ for these experiments.
The two main areas of MySpace that previously just used only Ajax and relied on server-side processing were the messaging inbox and friendslists.
The inclusion of expert-based judgments was useful because it allowed us to cover information that was previously neglected or only used implicitly.
