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| Patents for James K. Butzen | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,879,847 | Nov. 14, 1989 | R.D. Giese, K.C. Happ, J.K. Butzen | Cover for Pneumatic Tool | ||
| 4,898,524 | Feb. 06, 1990 | J.K. Butzen | Fluid Driven Rotary Motor | ||
| 5,022,289 | Jun. 11, 1991 | J.K. Butzen | Ratchet Tool with Flattened Pocket | ||
| D324,800 | Mar. 24, 1992 | R.D. Giese, K.C. Happ, J.K. Butzen | Sander | ||