C. A. Schroeder, INC.
Doing business as Ca Schroeder INC
At a glance
Employees1-19
In business sinceNot reported
HeadquartersSan Fernando, CA
US patents5
SAM.gov UEIM9Q7T6NLJA33
CAGE code7G5V9
Incorporated inCA
Brands
Circliner Duct Liner
Sheet Metal Components
Ductboard ItemsThis company sells these brands.
- flexible duct
- sheet metal duct
- fittings
- galvanized spiral pipe
- KD pipe
- elbows
- twyes
- ductboard duct
- HVAC industry
Named on the company’s own website, read JUL 29, 2026
Supplier designations
For Profit OrganizationManufacturer of GoodsWoman Owned BusinessWoman Owned Small Business
Self-certified by the company in its SAM.gov registration
Patents
5 US patents granted 1981–1992, none of them in the five years to SEP 2025.
Other special machines 3Thermal processes and apparatus 1Chemical engineering 1
- Duct core with strengthening tapeUS 5,167,260 · granted DEC 1, 1992
- Molded fiberglass air return filter grilleUS 4,801,316 · granted JAN 31, 1989
- Method for strengthening duct coresUS 4,478,657 · granted OCT 23, 1984
- Method of making a rigid fiberglass duct having an integral bendable elbowUS 4,400,863 · granted AUG 30, 1983
- Universal air diffuserUS 4,266,470 · granted MAY 12, 1981
Granted to C. A. Schroeder, Inc. · PatentsView (USPTO), data through SEP 30, 2025 · CC BY 4.0
Their plant
| Facility | City | State | Employees | Status |
|---|---|---|---|---|
| C. A. Schroeder, INC. | San Fernando | CA | 1–19 | ACTIVE |
Compiled from federal records — EPA, OSHA, SAM.gov and the U.S. Census — and from the company’s own website. Federal source data is public domain. Each plant’s page names the source of every field.