| 1921 | Porcelain Tiles | Company Product |
| 1922 | Porous Metal Bearings | Company Product |
| 1923 | Porous Metal Filters | Company Product |
| 1924 | Porous Sealers | Company Product |
| 1925 | Port Handling Equipment | Company Product |
| 1926 | Port Manually | Company Product |
| 1927 | Port Master | Company Product |
| 1928 | Port Normally | Company Product |
| 1929 | Portable | Company Product |
| 1930 | Portable (2.5hp - 20hp) | Company Product |
| 1931 | Portable (2.5hp To 20hp) | Company Product |
| 1932 | Portable Air Compressors | Company Product |
| 1933 | Portable Air Conditioners | Company Product |
| 1934 | Portable Air Conditioning | Company Product |
| 1935 | Portable Air Coolers | Company Product |
| 1936 | Portable Aircond | Company Product |
| 1937 | Portable Airconds | Company Product |
| 1938 | Portable Balancers | Company Product |
| 1939 | Portable Band Saws | Company Product |
| 1940 | Portable Banknote Detectors | Company Product |
| 1941 | Portable Bar Forming Machines | Company Product |
| 1942 | Portable Boring Machine | Company Product |
| 1943 | Portable Boring Machines | Company Product |
| 1944 | Portable Buildings | Company Product |
| 1945 | Portable CNC Cutting Equipment | Company Product |
| 1946 | Portable CNC Cutting Machines | Company Product |
| 1947 | Portable Cabin Containers | Company Product |
| 1948 | Portable Cabin, Site Office Container Leasing | Company Product |
| 1949 | Portable Cabins | Company Product |
| 1950 | Portable Calibrators | Company Product |