The phrase "are however designed" is correct and usable in written English.
It can be used to indicate that something is designed in a particular way, often following a contrasting statement.
Example: "These products are however designed to meet the highest safety standards, despite their low cost."
Alternatives: "are nonetheless created" or "are still intended".
Most of existing diamond CVD systems are, however, designed primarily for laboratory use.
The helium refrigerators employed for cooling these fusion devices are, however, designed for a steady heat load.
Few of these systems are, however, designed to be part of a complex socio-technical care and treatment processes in existing healthcare systems and clinical pathways.
LV borders were traced semiautomatically by both systems during strain analysis; the two systems are however designed to analyze different cardiac muscle layers.
The Green Deal was, however, designed to reach out to consumers as well as the social housing sector, and here's where landlords can play a key role.
It was, however, designed by two young members of his staff, Isi Metzstein and Andy MacMillan, atheists of German Jewish and Scottish Presbyterian backgrounds.
The theory is however designed for use within economic or technology models that allow technology substitutions.
The field trip – by providing them with an opportunity to meet some women in the field of medicine – is, however, designed to make them understand that while difficult, it is not impossible.
The new European Directive on Public Procurement is, however, designed to position LCC as central to sustainable sourcing.
It is, however, designed to be used at home – a dock will allow it to plug into a gamer's TV, making it effectively a solution both for the living room and for on the go.
Both films were, however, designed and promoted to showcase their leading ladies, thus continuing Tracy's reputation as a secondary star.
