Florida Division of Corporations (sunbiz.org), 2026-10-04

URL: https://search.sunbiz.org/Inquiry/CorporationSearch/SearchResults?inquiryType=EntityName&searchTerm=ELECTRODYNAMIC%20GRAVITY, then the detail record for document 346159. Query: entity name "ELECTRODYNAMIC GRAVITY" Result: positive (company record, priority 4).

Findings: ELECTRODYNAMIC GRAVITY, INC., Florida Profit Corporation [web] sunbiz.org detail, document 346159

Document number 346159. FEI/EIN 59-1292328.
Date filed: 13 May 1969.
This is about four weeks after application 816,366 was filed (15 Apr 1969) and a year after the 722,587 application (19 Apr 1968). Both patents are assigned to this company.
The essay in the folder describes "a small corporation" formed after Hooper's 1964 retirement. Whether there was an earlier vehicle before 1969 is unknown.
Status INACTIVE. Last event: VOLUNTARY DISSOLUTION, filed 9 Dec 1991.
Principal and mailing address changed on 12 June 1990 to San Jose, CA.
Officer: GIBSON, FRANCES G., title PT (president), San Jose, CA.
The registered agent was in Sarasota, FL.
Annual reports were filed for 1989, 1990 and 1991. No filing images are available online.

The company outlived Hooper by twenty years. Frances Gibson kept it as the vehicle for publishing his work:
New Horizons (1974);
Experimental Notes (1991).
She dissolved it in December 1991, the year the notes were published "because all patents ... have run out".
The Ohio addresses are a company record to check in the Ohio Secretary of State records:
543 Broad Blvd, Cuyahoga Falls, OH 44221 (in Childress 1998 and King 2002 via Google Books);
34 W. Tallmadge Ave, Akron, OH (Gibson 1983).