Invention House LLC
538 Leffingwell Ave, Ste a, Saint Louis, MO 63122
Operating signal within 12 months from two or more independent sources.
What they make
Relay and Industrial Control Manufacturing335314- variable frequency drives
- automated conformal
- conformal coating robotics
- 3-phase motor drives
- motor control consulting services
- aviation
- mil-spec requirements
NAMED ON THE COMPANY’S OWN WEBSITE, READ JUL 29, 2026
Where it is
Other plants nearby
| Facility | City | Industry | Status | Distance |
|---|---|---|---|---|
| Affton Auto Radiator and Air Conditioning Service, INC. | Fenton | Power Boiler and Heat Exchanger Manufacturing 332410 | ACTIVE | 4.7 KM |
| Magnetic Power Systems Inc-manufacturers Drive | Fenton | Relay and Industrial Control Manufacturing 335314 | UNVERIFIED | 5.9 KM |
| Abb Motors and Mechanical INC | St Louis | Metal Crown, Closure, and Other Metal Stamping (except Automotive) 332119 | LIKELY ACTIVE | 5.3 KM |
| Engineered Lifting Systems LLC | Fenton | Overhead Traveling Crane, Hoist, and Monorail System Manufacturing 333923 | ACTIVE | 8.1 KM |
| R. G. Weber Control Systems, Incorporated | Saint Louis | Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables 334513 | ACTIVE | 8.3 KM |
Also at this address
No other federal record shares this street address.
Where this record comes from
2 sources hold this plant, and 8 fields on this page come from them. Each line is one agency’s own record of it: the identifier it is filed under, whether that record shows the plant operating or only that it exists, and when the register first and last saw it there.
- The company’s own websiteOPERATINGfirst seen JUL 2026 · last seen OCT 2026
- SAM.gov entity registrationOPERATINGRecord GLTJNUEEJRH1 · first seen SEP 2025 · last seen JUL 2026
IN ST. LOUIS COUNTY12 other plants share this one’s industry (Electrical Equipment Manufacturing, NAICS 3353); 5 of them have a size band on record.
What each source says
Every field below, as each source filed it. The value this page shows is marked; where the sources disagree, the field says so. Status is computed from independent sources; nothing here is self-reported unless marked Claimed.
- Name
- SAM.gov: INVENTION HOUSE LLC · JUL 2026
- Street address
- SAM.gov: 538 LEFFINGWELL AVE · JUL 2026
- City
- SAM.gov: SAINT LOUIS · JUL 2026
- State
- SAM.gov: MO · JUL 2026
- Coordinates
- Census geocoder: 38.573907793835,-90.398771477245 · JUL 2026
- Website
- SAM.gov: InventionH.com · JUL 2026
- CAGE code
- SAM.gov: 58XJ1 · JUL 2026
- SAM registration expires
- SAM.gov: 2027-07-10 · JUL 2026