Ektelon
14Patents
0Active
14Granted
27Portfolio score
Filing activity: Jun 16, 1977 → Jun 28, 1994
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4561655A | Tubular steel racquet frame having varying cross-section | Human Necessities | 14 | Expired |
| US4130619A | Apparatus and method of making hollow articles | Performing Operations; Transporting | 14 | Expired |
| US4531738A | Racquetball racquet with increased hitting area | Human Necessities | 13 | Expired |
| US4684131A | Graphite composite racquet with aramid core | Emerging Cross-Sectional Technologies | 12 | Expired |
| US5568921A | Racquet stringing machine | Human Necessities | 10 | Expired |
| US4579343A | Graphite composite racquet | Emerging Cross-Sectional Technologies | 9 | Expired |
| US4546977A | Racquet stringing machine with improved racquet retaining standard | Emerging Cross-Sectional Technologies | 9 | Expired |
| USD290487S | Racquetball racquet | General | 8 | Expired |
| US4874170A | String clamp for racquet stringing machine | Emerging Cross-Sectional Technologies | 4 | Expired |
| US4290604A | Racquetball racquet having a metal frame meshable with a throat piece | Human Necessities | 4 | Expired |
| US4618148A | Racquetball racquet with increased hitting area | Human Necessities | 3 | Expired |
| US5470061A | Racquetball racquet having increased stiffness at tip | Human Necessities | 3 | Expired |
| USRE34067E | Racquetball racquet with increased hitting area improved racquetball racquet construction | General | 0 | Expired |
| USRE34068E | Racquetball raquet with increased hitting area | General | 0 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.