H & S Manufacturing Co., Inc.
32Patents
8Active
32Granted
42Portfolio score
Filing activity: Mar 9, 1984 → Aug 27, 2020 · 2 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5598691A | Folding hay rake with stabilizing support assembly | Human Necessities | 35 | Expired |
| US5305590A | Wheel rake | Emerging Cross-Sectional Technologies | 34 | Expired |
| US4785614A | Combination rake and tedding apparatus | Human Necessities | 27 | Expired |
| US5199252A | Wheel rake | Emerging Cross-Sectional Technologies | 24 | Expired |
| US5540040A | Folding hay rake | Human Necessities | 24 | Expired |
| US6212865A | Windrow merger | Emerging Cross-Sectional Technologies | 24 | Expired |
| US5386943A | All purpose V-shaped manure spreader | Human Necessities | 23 | Expired |
| US6405517B1 | Folding wheel rake with improved folding mechanism | Human Necessities | 18 | Expired |
| US6715274B2 | Accelerator roller for windrow merger | Human Necessities | 16 | Expired |
| US4585266A | Manure spreader having shiftable cover | Performing Operations; Transporting | 16 | Expired |
| US8863489B2 | Tine drive cam for windrow merger | Emerging Cross-Sectional Technologies | 13 | Active |
| US6070400A | Forage wrapping device and method | Human Necessities | 13 | Expired |
| US6038844A | Folding hay rake with extension linkage | Human Necessities | 10 | Expired |
| US7871024B2 | Manure spreader with reverse flighting | Human Necessities | 10 | Active |
| US9038358B2 | Drive mechanism for a windrow merger | Emerging Cross-Sectional Technologies | 7 | Active |
| US7328567B2 | Wheel rake | Human Necessities | 6 | Expired |
| US5042587A | Tool bar with quick release tool lock | Human Necessities | 5 | Expired |
| US6694715B2 | Inverter shield for a windrow merger | Human Necessities | 4 | Expired |
| US6224506A | Forage box clutch mechanism | Mechanical Engineering; Lighting; Heating | 4 | Expired |
| US5090268A | Two speed gearbox | Emerging Cross-Sectional Technologies | 3 | Expired |
| US6561935B2 | Forage box clutch mechanism | Mechanical Engineering; Lighting; Heating | 3 | Expired |
| US6726368B2 | Anti-wrap guard | Performing Operations; Transporting | 2 | Expired |
| US9295189B2 | Windrow merger pickup head shiftable mount | Emerging Cross-Sectional Technologies | 2 | Active |
| US7322568B2 | Damping spring for use in agricultural implements | Human Necessities | 2 | Expired |
| US6129630A | Split apron forage box container | Human Necessities | 1 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.