| Number | Name | Date | Kind |
|---|---|---|---|
| 1844410 | Schalk | Feb 1932 | |
| 3426367 | Bradford | Feb 1969 | |
| 4653226 | Woodrow | Mar 1987 | |
| 4671012 | Merklinger et al. | Jun 1987 | |
| 4817334 | Badger et al. | Apr 1989 | |
| 5007200 | Londono | Apr 1991 | |
| 5018302 | Kluge | May 1991 | |
| 5339567 | Pierpont et al. | Aug 1994 | |
| 5590974 | Yang | Jan 1997 | |
| 5779386 | Eichhorn | Jul 1998 | |
| 5916074 | Tracy | Jun 1999 |
| Entry |
|---|
| Automatic Specialties, Inc., "Guardian Angel.TM. Window Guard"; Marlborough, Massachusetts, 1997. |