An important concern for government contracts clients is the government's rights in inventions, proprietary drawings, schematics, practices, data, and computer software that are used, created, or modified by the client during the course of its performance under a government contract or grant. Under complex and ever changing regulations, which differ on an agency-by-agency basis, the government is entitled to rights to technology in part or in whole developed with government funds. Determining and negotiating the rights of prime contractors, subcontractors and vendors who are contributing technology must be well planned. We provide expert guidance in this area. This includes recommending measures to protect pre-existing technology developed at private expense and appropriate non-disclosure agreements and reservations of rights.