Number | Name | Date | Kind |
---|---|---|---|
939071 | Ney | Nov 1909 | A |
1274618 | Smith | Aug 1918 | A |
1345179 | Heltzel | Jun 1920 | A |
1382082 | Heltzel | Jun 1921 | A |
1756514 | Hempstead | Apr 1930 | A |
1911146 | Diehl | May 1933 | A |
1939007 | Heltzel | Dec 1933 | A |
2793416 | Yearling | May 1957 | A |
3405905 | Dakin | Oct 1968 | A |
3771757 | Black | Nov 1973 | A |
3785606 | Green | Jan 1974 | A |
3797800 | Loy | Mar 1974 | A |
4022437 | French | May 1977 | A |
4121804 | O'Leary | Oct 1978 | A |
4340200 | Stegmeier | Jul 1982 | A |
4397127 | Mieyal | Aug 1983 | A |
4533112 | Santos, Jr. et al. | Aug 1985 | A |
4659054 | Allen | Apr 1987 | A |
4750703 | Gentilcore et al. | Jun 1988 | A |
4824068 | Ferland | Apr 1989 | A |
5076536 | Fitzgerald | Dec 1991 | A |
5079884 | Menchetti | Jan 1992 | A |
5154837 | Jones | Oct 1992 | A |
5174083 | Mussell | Dec 1992 | A |
5343667 | Peden | Sep 1994 | A |
5655336 | Azar | Aug 1997 | A |
5927038 | Goldberg et al. | Jul 1999 | A |
6021994 | Shartzer, Jr. | Feb 2000 | A |
6158710 | Matthews | Dec 2000 | A |
6332599 | Spartz | Dec 2001 | B1 |
Number | Date | Country |
---|---|---|
2036155 | Jun 1980 | GB |
Entry |
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Jun. 1999 Product Brochure for Durand Forms, Footing Form System (including pictures). |
Jun. 1998 Dee Streamlined Steel Forms and Stakes Brochure. |
1999 Metal Forms Corp. Brochure. |
Concrete Construction Article—Feb. 1990 —Title: Flatwork Forming is a Snap Using Plastic Formwork System. |