Koehring Company
81Patents
0Active
81Granted
39Portfolio score
Filing activity: May 17, 1973 → Oct 24, 1990
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4443187A | Portable heater with integrated control system | Emerging Cross-Sectional Technologies | 54 | Expired |
| US4720207A | Segmented rotor | Fixed Constructions | 43 | Expired |
| US4474166A | Wick heaters | Mechanical Engineering; Lighting; Heating | 42 | Expired |
| US4384224A | Drive unit for flexshaft vibrators | Electricity | 38 | Expired |
| US3937339A | Vehicle having transverse leveling means | Performing Operations; Transporting | 37 | Expired |
| US3940913A | Row crop harvesting apparatus | Human Necessities | 37 | Expired |
| US4024710A | Load sensing hydraulic circuit having power matching means | Mechanical Engineering; Lighting; Heating | 33 | Expired |
| US4165613A | Control apparatus for a plurality of simultaneously actuatable fluid motors | Mechanical Engineering; Lighting; Heating | 32 | Expired |
| US4313417A | Portable space heater | Emerging Cross-Sectional Technologies | 30 | Expired |
| US3992500A | Vented extruder | Performing Operations; Transporting | 29 | Expired |
| US4342335A | Hydraulic valve detent mechanism | Emerging Cross-Sectional Technologies | 29 | Expired |
| US4632630A | Forklift attachment | Performing Operations; Transporting | 29 | Expired |
| US3973197A | Peak detector | Physics | 29 | Expired |
| US4532914A | Portable LP space heater | Emerging Cross-Sectional Technologies | 27 | Expired |
| US4081238A | Portable heater | Emerging Cross-Sectional Technologies | 26 | Expired |
| US3951579A | Apparatus for facilitating access to the mold halves of a molding machine | Performing Operations; Transporting | 25 | Expired |
| US4015832A | Extruder screws | Performing Operations; Transporting | 24 | Expired |
| USD246891S | Plastic container for liquids or the like | General | 23 | Expired |
| US4043405A | Pile-driving arrangement | Emerging Cross-Sectional Technologies | 21 | Expired |
| US4079232A | Contact heater mechanisms for thermoforming machines | Emerging Cross-Sectional Technologies | 20 | Expired |
| US4621871A | Quickly replaceable cutter socket | Fixed Constructions | 20 | Expired |
| US4262755A | Shock absorbing pile driver | Fixed Constructions | 20 | Expired |
| US3964246A | Rotary baler | Human Necessities | 20 | Expired |
| US3935712A | Cable laying vibratory plow assembly | Fixed Constructions | 19 | Expired |
| US3951162A | Control valve with flow control means | Emerging Cross-Sectional Technologies | 18 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.