Catalog of Copyright Entries. Third Series: 1954: January-June
Keyboard word builder
Parmelia Margaret Mills, sole owner P. M. Mills Co.; 29Jan54; A129165. MILLS, PARMELIA MARGARET, sole owner P. M. MILLS COMPANY.
Also had game Globe-Trotters which was evidently sold to Selchow & Righter.
Parts box for that game lists:
P. M. Mills Co.
1705 Belmont Avenue
Seattle 22, Washington