I found out that wmic supports Where-Clauses, so I came up with the following:

wmic service where "not Pathname like '"%"'" GET Name,Pathname /FORMAT:csv>result.csv

wmic service where "not Pathname like '"%"'" Looks for Services with Pathnames not encapsulated with Quotes

GET Name,Pathname extracts the Name of the service as well as its path

/FORMAT:csv>result.csv formats to csv and exports to file result.csv in the same directory.