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1930's
1940's
1950's
1960's
1970's
1980's
1990's
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| 1932-1933 |
P&M Manufacturing
Company developed a 5/16 inch by 36 inch sectional steel sewer rod and
tools for cleaning mainline sewers. |
| 1935 |
Mr. Crane
sold his interest in P&M Manufacturing Company and founded Flexible Sewer
Rod Equipment Company. It was located in Los Angeles, California. Flexible
designed and patented the first power drive (PD-50). |
| 1936-1942 |
Flexible
developed many innovations in sewer cleaning equipment. |
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