Issued Patents All Time
Showing 51–66 of 66 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4859130 | Material handling attachment for a tractor having a multiple-point hitch assembly | Joseph W. Langenfeld | 1989-08-22 |
| 4797051 | Loader device for a tractor | Joseph W. Langenfeld | 1989-01-10 |
| 4787811 | Quick attach means for attachments | Joseph W. Langenfeld | 1988-11-29 |
| 4770595 | Electrically operated material handling attachment for a garden tractor or the like | Randal W. Thompson, Joseph W. Langenfeld | 1988-09-13 |
| 4753568 | Material handling attachment for a tractor having a multiple-point hitch assembly | Joseph W. Langenfeld | 1988-06-28 |
| 4746254 | Material handling attachment for a tractor having a multiple-point hitch assembly including a high-lift mechanism | Joseph W. Langenfeld | 1988-05-24 |
| 4725189 | Rear-mounted loader bucket for a tractor including roll-back means | Joseph W. Langenfeld | 1988-02-16 |
| 4621973 | Tractor loader having multi-adjustment mountings | Joseph W. Langenfeld | 1986-11-11 |
| 4606692 | Quick-mount loader for articulated tractors | Joseph W. Langenfeld | 1986-08-19 |
| 4601634 | Cylinder strain relief linkage for a loader device for a tractor or the like | Joseph W. Langenfeld | 1986-07-22 |
| 4538955 | Adjustable tower for front end tractor loaders | Joseph W. Langenfeld | 1985-09-03 |
| 4431207 | Automatic hitch device | Joseph W. Langenfeld | 1984-02-14 |
| 4415303 | Auger wagon | Joseph W. Langenfeld | 1983-11-15 |
| 4266906 | Materials handling device and the method of mounting the same on a tractor | Joseph W. Langenfeld | 1981-05-12 |
| 4266909 | Means for hydraulic self-leveling of a loader bucket | Joseph W. Langenfeld | 1981-05-12 |
| 4222442 | Method and apparatus for power mounting an implement on a tractor | Joseph W. Langenfeld | 1980-09-16 |