Standardization activities are strategically important in telecommunications, information, electronics and electrics industries. In these industries, layered business structure or modularization is becoming more popular and the necessary to precisely standardize the module interface is increasing. It often happens that marketable products need patents that are owned by many different companies since a large number of companies in the industries perform R&D in similar areas. Standardization activities are a mechanism to share patents among these patent holders. In addition, the economy of scale is a general nature in the industries. Companies in the industries must perform standardization activities strategically. However, it is not enough to simply participate in such activities. Companies should move proactively to have their patented and non-patented technologies incorporated in standards. They must participate in activities aggressively by submitting technical proposals, inviting and chairing meetings, and so on.