| 1953 DU PONT Blasting Initiator Loading Machine |
| 1959 BRYAN PAUL Blasting Initiator Patent Print |
| 1945 DU PONT Electric Blasting Initiator Patent |
| 1959 AMERICAN CYANAMID CO Electric Blasting Initiator |
| 1955 ADELBERT Blasting Initiator Composition Art |
| 1941 LOUGHEED Electric Blasting Initiator Patent |
| 1945 HANDFORTH Electric Blasting Initiator Art |
| 1959 EARLE SCHULZ Blasting Initiator Patent |
| 1940 HANDFORTH Electric Blasting Initiator Art |
| 1941 JOHNSON Protective Electric Blasting Initiator |
| 1959 DU PONT Blasting Initiator Patent Print Art |
| 1941 HARDT Electric Blasting Initiator Patent |
| 1950 HERCULES POWDER LTD Blasting Initiator Art |
| 1949 MILLER ROSS Blasting Initiator Patent Print |
| 1940 JOHNSON Electric Blasting Initiator Patent |
| 1950 CAIRNS ROBERT Blasting Initiator Patent |
| 1953 RUSSELL Blasting Initiator Loading Machine |
| 1949 DU PONT Blasting Initiator Patent Print Art |
| 1941 LAWRENCE Blasting Initiator Patent Print |
| 1942 DU PONT Electric Blasting Initiator Patent |
| 1959 BAYARD Electric Blasting Initiator Patent |
| 1955 DU PONT Blasting Initiator Composition Art |
| 1954 ADELBERT Blasting Initiator Patent Print |
| 1959 RUSSELL Blasting Initiator Patent Print Art |
| 1954 DU PONT Blasting Initiator Patent Print Art |