Patent Grant
D387183
| Number | Name | Date | Kind |
|---|---|---|---|
| D26828 | Russel | Mar 1897 | |
| D185611 | Paulson | Jun 1959 | |
| D192288 | Mason | Feb 1962 | |
| D264996 | Siedschlag | Jun 1982 | |
| D265689 | Miniere | Aug 1982 | |
| D291601 | D'Antonio et al. | Aug 1987 | |
| D306764 | D'Antonio et al. | Mar 1990 | |
| 1441156 | Kindstrom | Jan 1923 | |
| 2933146 | Zaldastani et al. | Apr 1960 | |
| 3506089 | Junger | Apr 1970 | |
| 3774339 | Swett | Nov 1973 | |
| 3837426 | Kleinschmidt | Sep 1974 | |
| 3866001 | Kleinschmidt et al. | Feb 1975 | |
| 4016693 | Warren | Apr 1977 | |
| 4197669 | Hynes | Apr 1980 | |
| 4269013 | West | May 1981 | |
| 4319661 | Proudfoot | Mar 1982 | |
| 4499142 | Kingston | Feb 1985 | |
| 4821839 | D'Antonio et al. | Apr 1989 | |
| 4833852 | West | May 1989 | |
| 4964486 | D'Antonio et al. | Oct 1990 | |
| 5027920 | D'Antonio et al. | Jul 1991 | |
| 5168129 | D'Antonio | Dec 1992 | |
| 5193318 | D'Antonio et al. | Mar 1993 | |
| 5226267 | D'Antonio et al. | Jul 1993 | |
| 5401921 | D'Antonio et al. | Mar 1995 | |
| 5560173 | Scheiwiller | Oct 1996 |
| Entry |
|---|
| Proudfoot Company, Inc., "SOUNDBLOX--Sound-Absorbing Structural Masonry Units". |
| Proudfoot Company, Inc. Spec-Data "Sound Absorbing Masonry Units". |
