Dumangas, M. L. List of patentees to whom patents were issued by the Philippines Patent Office during the period 1948-1961 with a subject index to patents.
Chicago Style (17th ed.) CitationDumangas, Marianita Luspo. List of Patentees to Whom Patents Were Issued by the Philippines Patent Office During the Period 1948-1961 with a Subject Index to Patents.
MLA (9th ed.) CitationDumangas, Marianita Luspo. List of Patentees to Whom Patents Were Issued by the Philippines Patent Office During the Period 1948-1961 with a Subject Index to Patents.
Warning: These citations may not always be 100% accurate.