Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4874180 | Arrow shaft end adaptor apparatus and balance pin apparatus and method | Dennis L. Carlson, Bruce A. Nelson, Robert D. Eickhoff | 1989-10-17 |
| 4836504 | Rail-type fence using electricity | Robert D. Eickhoff | 1989-06-06 |