# PROTOSOURCE CORP

PROTOSOURCE CORP is a company headquartered in Fresno, CA, United States.

## Company overview

- **Legal name:** PROTOSOURCE CORP
- **Classification:** Company
- **Industry (SIC):** 7373 — Services-Computer Integrated Systems Design
- **Headquarters:** Fresno, CA, United States
- **Incorporated in:** CA
- **Fiscal year end:** December 31
- **SEC CIK:** 0000932772

## About

PROTOSOURCE CORP is identified in the retained SEC EDGAR snapshot dated 2026-10-14. Its SEC Central Index Key is 0000932772, and its reported industry is Services-Computer Integrated Systems Design. The retained history contains 12 filings, including 10-Q filed on 2009-11-20. Each filing retains its accession, filing date and original SEC document link. This historical evidence does not establish current registration, listing, ownership or financial condition.

## Recent SEC filings

- Form 10-Q — filed 2009-11-20 — period 2009-09-30 — 10-Q
- Form 8-K — filed 2009-09-02 — period 2009-09-01 — 8-K
- Form 10-Q — filed 2009-08-14 — period 2009-06-30 — FORM 10-Q (JUNE 30, 2009)
- Form 10-Q — filed 2009-05-15 — period 2009-03-31 — FORM 10-Q (3/31/09)
- Form 10-K — filed 2009-04-15 — period 2008-12-31 — 10-K
- Form 10-Q — filed 2008-11-19 — period 2008-09-30 — 10-Q
- Form 10-Q — filed 2008-08-18 — period 2008-06-30 — FORM 10-Q (6/30/2008)
- Form 10-Q — filed 2008-05-15 — period 2008-03-31 — 10-Q
- Form DEF 14A — filed 2007-10-31 — period 2007-12-11 — DEF 14A
- Form 8-K — filed 2003-02-24 — period 2003-02-13 — 8-K
- Form 8-K — filed 2003-02-03 — period 2003-01-30 — 8-K
- Form SC 13G — filed 2001-07-25 — SCHEDULE 13G

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Updated: 2026-10-23T22:21:44Z

Canonical page: https://altss.com/profile/protosource-corp

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