| 1951 | Viking VK636 - Mirage QREC Light Hazard ELO Concealed Pendent Sprinkler (K11.2) | |
| 1952 | Viking VK608 - EC/QREC Light Hazard Extra-Large Orifice Pendent Sprinkler (K11.2) | |
| 1953 | Viking VK612 - Microfast® HP EC/QREC Horizontal Sidewall Sprinklers (K5.6) | |
| 1954 | Viking VK605 - Microfast® EC/QREC Horizontal Sidewall Sprinkler (K5.6) | |
| 1955 | Viking VK572 - EC/QREC Ordinary Hazard Pendent Spk (K14.0) | |
| 1956 | Viking VK570 - EC/QREC Ordinary Hazard Upright Spk (K14.0) | |
| 1957 | Viking VK630-D - QREC Concealed Horizontal Sidewall Sprinkler (K8.0) | |
| 1958 | Viking VK638-D - QREC Concealed Horizontal Sidewall Sprinkler (K8.0) | |
| 1959 | Viking VK630 - QREC Horizontal Sidewall Sprinkler (K8.0) | |
| 1960 | Viking VK680 - QREC Concealed Horizontal Sidewall Sprinkler (K8.0) | |
| 1961 | Viking VK638 - "Corridor Sprinkler" - QREC Horizontal Sidewall Sprinkler (K8.0) | |
| 1962 | Viking VK611 - Microfast® HP EC/QREC Fusible Element Pendent Sprinkler (K5.6) | |
| 1963 | Viking VK601 - QREC Fusible Element Pendent Sprinkler (K5.6) | |
| 1964 | Viking VK613 - Microfast® HP EC/QREC Fusible Element Horizontal Sidewall Sprinkler (K5.6) | |
| 1965 | Viking VK609 - Microfast® EC/QREC Fusible Element Horizontal SidewallSprinkler (K5.6) | |
| 1966 | Viking VK537 - EC/QREC Ordinary Hazard ELO Fusible Element Pendent Sprinkler (K11.2) | |
| 1967 | Viking VK535 - EC/QREC Ordinary Hazard ELO Fusible Element Upright Sprinklers (K11.2) | |
| 1968 | Viking VK603 - QREC Fusible Element Pendent Sprinkler (K 8.0) | |
| 1969 | Viking VK617 - Microfast® EC/QREC Light Hazard ELO Fusible Element Pendent Spk (K11.2) | |
| 1970 | Viking VK530 - ELO Upright Sprinkler (Storage-Density/Area) (K11.2) | |
| 1971 | Viking VK531 - QR ELO Upright Sprinkler (Storage-Density/Area) (K11.2) | |
| 1972 | Viking VK536 - ELO Pendent Sprinkler (Storage-Density/Area) (K11.2) | |
| 1973 | Viking VK533 - QR ELO Fusible Element Upright Sprinkler (Storage-Density/Area) (K11.2) | |
| 1974 | Viking VK595 - Extended Coverage Upright Sprinkler (CMDA/CMSA) (K25.2) | |
| 1975 | Viking VK580 - Upright Sprinkler (Storage-Density/Area) (K16.8) | |
| 1976 | Viking VK520 - ESFR Upright Sprinkler (K14) | |
| 1977 | Viking VK502 - ESFR Dry Pendent Sprinkler (K14) | |
| 1978 | Viking VK500 - ESFR Pendent Sprinkler (K14) | |
| 1979 | Viking VK503 - ESFR Pendent Sprinkler (K17) | |
| 1980 | Viking VK504 - ESFR Dry Pendent Sprinkler (K16.8) | |