Messrs. Willibald Grammer
8Patents
0Active
8Granted
28Portfolio score
Filing activity: Feb 9, 1977 → Jan 6, 1984
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4601514A | Seat having an adjustable back support arrangement | Human Necessities | 87 | Expired |
| US4125242A | Spring mounted seat with height adjustment | Performing Operations; Transporting | 31 | Expired |
| USD264643S | Office chair | General | 28 | Expired |
| US4153294A | Apparatus for adjusting the inclination of seat upholstery in a driver's seat, office chair, revolving armchair or the like | Human Necessities | 13 | Expired |
| US4206533A | Push button lock for safety belt | Human Necessities | 5 | Expired |
| US4558902A | Travel seat | Performing Operations; Transporting | 3 | Expired |
| US4397501A | Vehicle seat, more specially for commercial vehicles | Performing Operations; Transporting | 2 | Expired |
| US4226385A | Retractor for safety belts | Performing Operations; Transporting | 1 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.