Charles W. Johnson
19Patents
9h-index
28Co-inventors
72Inventor score
Filing activity: Apr 5, 1974 → May 22, 2012
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US3980136A | Fracturing well formations using foam | Emerging Cross-Sectional Technologies | 116 | Expired |
| US5974574A | Method of comparing replicated databases using checksum information | Physics | 55 | Expired |
| US6360303B1 | Partitioning memory shared by multiple processors of a distributed processing system | Physics | 47 | Expired |
| US5271537A | Foam dispensing device | Performing Operations; Transporting | 39 | Expired |
| USD610087S1 | Dry-type power distribution transformer | General | 26 | Expired |
| US7834736B1 | Dry type pole-mounted transformer | Electricity | 25 | Active |
| US5679251A | Wound oil filter | Performing Operations; Transporting | 12 | Expired |
| US4845194A | Glycopeptide recovery process | Chemistry; Metallurgy | 11 | Expired |
| US6869120B2 | Dash box for a recreation vehicle | Performing Operations; Transporting | 10 | Expired |
| US8111123B2 | Disc wound transformer with improved cooling | Emerging Cross-Sectional Technologies | 9 | Active |
| US7954179B2 | Water closet bolt | Fixed Constructions | 8 | Active |
| US5552065A | Oil filtration method and element of wound cotton/paper composition | Performing Operations; Transporting | 6 | Expired |
| US8884732B2 | Dry-type network transformer | Emerging Cross-Sectional Technologies | 5 | Active |
| US9190230B2 | Grounding switch | Emerging Cross-Sectional Technologies | 3 | Active |
| US6615411B2 | Toilet seat sanitary protector changer | Human Necessities | 2 | Expired |
| US3996992A | Method of vacuum casting molten metal | Performing Operations; Transporting | 2 | Expired |
| US9416525B2 | Water closet bolt | Fixed Constructions | 1 | Active |
| US8310330B2 | Dry-type transformer | Electricity | 0 | Active |
| US8970338B2 | Transformer having a core frame with interlocking members | Emerging Cross-Sectional Technologies | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.