The phrase "are subsequently seen" is correct and usable in written English.
It can be used to indicate that something is observed or noticed after a certain event or action has taken place.
Example: "The results of the experiment are subsequently seen in the data analysis section of the report."
Alternatives: "are later observed" or "are then noticed".
It's subsequently seen as one of the precursors of the First Amendment to the American Constitution.
More than 50 works first presented in some form at the 10 previous Pacific Playwrights Festivals were subsequently seen elsewhere.
Enhanced survival is subsequently seen in immunized mice following challenge with sporozoites, which mimics the natural route of infection more closely than when using infected red blood cells.
In the direct hepatic implantation model, a localized tumor developed in the liver in all cases and intrahepatic dissemination was subsequently seen in about one-half of cases.
The first peak-time example was subsequently seen on Coronation Street in the form of a Nationwide ATM installed inside the shop of the character Dev Alahan.
She was ushered out of the series after a threat on her life delivered by one of Tony's henchmen, who was subsequently seen driving off with some groceries.
Mr. Walsh's "Walworth Farce," a sensation at the festival last year in a production from the Druid Theater of Galway, Ireland, was subsequently seen in New York and opens in London this fall.
In other cases, the ones which were subsequently seen as the most successful cases, domestic investment was funded by policies that constrained domestic consumption and so forced up domestic savings.
On 12 March, he ignored an order from top-level officials to stop pumping sea water into one of the reactors - actions that were subsequently seen as having prevented the situation from getting even worse.
