Here are the details of other Prior Art Searches that could possibly be outsourced:
Trademark Search
A trademark search entails reviewing trademarks with similar marks, and/ or in comparable goods and services, as your own product name.
Technical Literature Search
Technical literature searches involve the review of non-patent documents from computer databases online. These documents may be newspapers, journals, magazines, and other publications

Collection Search
Collection searches normally involve the gathering of all U.S. patents relating to any one subject matter or invention. Any patent pertinent to the invention are to be included. Dependant upon the scope of the invention such a search can turn up even as many as 300 patents. But such a search can be contained through specification of year/s, location, inventors or assignees and the invention itself.
State of the Art Search
This type of search aims at finding patents representing the general state of art (technology) for a specific type of invention or subject matter. Akin to a collection search, the searcher is, however, allowed discretion when selecting patents. The search normally traces patents of the last 15 to 20 years, and includes published patent applications.
Assignment/Patentee Search
A patentee search uncovers patents invented by a specific person whereas
an assignment search uncovers patents assigned at issue or post issue to an actual company or body. A summary of title for a patent can also be bought.
Right to Use/Clearance Search
Finally, a clearance search or right to use search is inclusive of a complete infringement search through unexpired U.S. patents that could possibly present an encroachment problem in regard to the invention in question. It could also entail an extremely limited validity search through unexpired and expired patents/ publications which could possibly be used to invalidate any patents capable of causing an infringement situation. Expired patents could also be tracked down to supply evidence that a particular invention has already been made public.