3 Patents
#367 in St. Louis, MO
#994 in Missouri
#71,923 in US
Valley Mineral Products Corporation
Forward Citations = 20
3 inventors:
St. Louis, MO, United States of America
3 inventors (with patents filed for the assignee):
John P Holt (3 out of 3 patents)
Theodore P Cash (3 out of 3 patents)
Delbert E Day (1 out of 43 patents)
3 patents:
#367 in St. Louis, MO
#994 in Missouri
#71,923 in US
3 inventors: