The phrase "and in the case of many" is correct and usable in written English.
It can be used when discussing situations or conditions that apply to a large number of instances or individuals.
Example: "The results were varied, and in the case of many participants, their scores improved significantly after the intervention."
Alternatives: "for many instances" or "in many situations".
Designers went back to what they know best and in the case of many that meant short, tight and bright.
The violence in Israel and the Palestinian territories has left American Jews feeling agonized, confused, angry and, in the case of many, more doubtful than ever that Yasir Arafat and his people truly want peace.
Some question whether it is worth hiring them -- and in the case of many districts with alternate-route programs, paying more than $10,000 per teacher for their graduate studies -- if they will only jump ship.
Paul Ryan, the Speaker of the House, appeared satisfied and fond of the President, for the most part; Democrats expressed their discontent with some pointed silences and, in the case of many of the women, outfits in suffragette white.
But to attract everyone in between, retailers will have to build a strong online offering while making their shops nicer, more conveniently located and, in the case of many big-box retailers, smaller.
Yet the knotty social and economic problems (and, in the case of many Rohingyas, the violence) that drive migrants to flee are still there along with the pervasive corruption encouraging the people-trafficking.
Investment theft losses are particularly favorable, since they are treated like business losses and can be carried back for three and in the case of many Madoff investors five years and carried forward for 20 years.
In my case, and the case of many women I know, it doesn't work.
Protist life cycles range from relatively simple ones that may involve only periodic binary fissions to very complex schemes that may contain asexual and sexual phases, encystment and excystment, and in the case of many symbiotic and parasitic forms an alternation of hosts.
Unfortunately in the case of Haiti, many humanitarian groups left.
In the case of Solaris, space has many resonances.
