The phrase "a patchwork of national" is correct and usable in written English.
It can be used to describe a situation or entity that is made up of various national elements or characteristics, often implying diversity or complexity.
Example: "The festival was a patchwork of national traditions, showcasing the rich cultural heritage of the participating countries."
Alternatives: "a mosaic of national" or "a blend of national".
Europe remains a patchwork of national energy policies and regulation.
Earlier efforts by a patchwork of national regulators to conduct supposed "stress tests" on Europe's banks proved woefully inadequate.
The proposed directive would supplant a patchwork of national laws in Europe that have made reporting mandatory in Germany and Spain, but voluntary in Britain and Italy.
South Sudan's security forces — a patchwork of national soldiers, local militiamen, intelligence officers and police troops — have also been accused of abuses as the government tries to consolidate control over South Sudan's vast expanse of territory.
China is desperate to become a player in global information culture, but it has hobbled itself with the government's argument that the Internet is a patchwork of national values, rather than a shared global ethos.
For more than a decade, the European Union has sought to unify a patchwork of national air traffic control systems — part of a master plan known as the Single European Sky.
But in reality, it is a patchwork of 27 national markets where operators charge people fees whenever they cross a border with their smartphones.
The commission said the current lack of an E.U. framework for body scanners was already creating a patchwork of different national procedures and standards.
When it comes to what is called contract law in the European Union, the single market is actually a patchwork of 27 national legal codes offering varying degrees of protection to consumers and merchants.
A "complex patchwork" of national and state certifications for gambling addiction made it easier for some insurers to deny reimbursement, he said.
The western coast of Canada is also a dense patchwork of national and provincial parks and other protected lands that would make such a pipeline particularly difficult to permit, and Verleger said limitations on tanker activity in the area's waterways leave the southbound route the only sensible one for Canadian oil interests.
