Prototypes, Ltd.
5Patents
0Active
5Granted
31Portfolio score
Filing activity: Jul 2, 1984 → Mar 3, 1988
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4826515A | Vacuum cleaning apparatus | Emerging Cross-Sectional Technologies | 257 | Expired |
| US4573236A | Vacuum cleaning appliances | Human Necessities | 183 | Expired |
| US4571772A | Upright vacuum cleaning appliance | Human Necessities | 126 | Expired |
| US4593429A | Vacuum cleaning appliance | Emerging Cross-Sectional Technologies | 109 | Expired |
| USRE32257E | Vacuum cleaning appliances | General | 21 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.