Engineering activities for technical building equipment companies in Gelsenkirchen

Gelsenkirchen ·Currently listed companies in the Engineering activities for technical building equipment industry headquartered in Gelsenkirchen.

32 companies · 21–32 of 32

RAM Ingenieurbüro für Rohrleitungs-, Apparate- und Maschinenbau Beteiligungs-GmbH GmbH · HRB 3495 Gelsenkirchen · 1987
dab82f4719…
RAM Ingenieurbüro für Rohrleitungs-, Apparate- und Maschinenbau GmbH & Co. KG GmbH & Co. KG · HRA 1914 Gelsenkirchen · 1987
f4cfed63da…
s.p.b. UG (haftungsbeschränkt) UG (haftungsbeschränkt) · HRB 12953 Gelsenkirchen · 2015
29309bc690…
Sachverständigenbüro Prager GmbH GmbH · HRB 13085 Gelsenkirchen · 2015
78f2076879…
se.mo Service + Montage Gesellschaft für technische Anlagen mbH GmbH · HRB 4321 Gelsenkirchen · 2002
fa445facfc…
SKIBA Ingenieurgesellschaft für Gebäudetechnik mbH GmbH · HRB 14395 Gelsenkirchen · 1998
24e6065e11…
Tech-MM UG (haftungsbeschränkt) UG (haftungsbeschränkt) · HRB 15034 Gelsenkirchen · 2019
c3ce37a374…
TJ PLANBAU UG (haftungsbeschränkt) UG (haftungsbeschränkt) · HRB 12985 Gelsenkirchen · 2015
b16115c3bf…
Uniper Nuclear Services GmbH GmbH · HRB 95394 Düsseldorf (Dusseldorf) · 2021
d1e88adc9f…
Uniper Technologies GmbH GmbH · HRB 3171 Gelsenkirchen · 1998
2efc9244f6…
VTA Verfahrenstechnik und Automatisierung GmbH GmbH · HRB 3693 Gelsenkirchen · 1979
ceff1b4f2c…
Westfalen Personal GmbH GmbH · HRB 14923 Gelsenkirchen · 2018
d36cebe76f…

All industries in Gelsenkirchen

Live API

GEThandelsregister.ai/api/v1/search-organizations

?limit=20

&skip=20

&filters={"city":"Gelsenkirchen","industry_code":"71.12.3","industry_scheme":"WZ2025"}

# pip install handelsregister
from handelsregister import Handelsregister

client = Handelsregister(api_key="YOUR_API_KEY")  # or set HANDELSREGISTER_API_KEY
page = client.search_organizations(
    filters={
        "city": "Gelsenkirchen",
        "industry_code": "71.12.3",
        "industry_scheme": "WZ2025"
    },
    limit=20,
    skip=20,
)
print(page["total"])
for item in page["results"]:
    print(item["name"], item["registration"]["register_number"])

// npm install handelsregister
import { Handelsregister } from 'handelsregister';

const client = new Handelsregister('YOUR_API_KEY'); // or set HANDELSREGISTER_API_KEY
const page = await client.searchOrganizations({
  filters: {
      "city": "Gelsenkirchen",
      "industry_code": "71.12.3",
      "industry_scheme": "WZ2025"
  },
  limit: 20,
  skip: 20,
});
console.log(page.total);
for (const item of page.results) {
  console.log(item.name, item.registration.register_number);
}

// npm install handelsregister
const { Handelsregister } = require('handelsregister');

const client = new Handelsregister(process.env.HANDELSREGISTER_API_KEY);
(async () => {
  const page = await client.searchOrganizations({
    filters: {
        "city": "Gelsenkirchen",
        "industry_code": "71.12.3",
        "industry_scheme": "WZ2025"
    },
    limit: 20,
    skip: 20,
  });
  console.log(page.total);
  for (const item of page.results) {
    console.log(item.name, item.registration.register_number);
  }
})();

curl 'https://handelsregister.ai/api/v1/search-organizations?limit=20&skip=20' \
  -H 'x-api-key: YOUR_API_KEY' \
  -G --data-urlencode 'filters={"city":"Gelsenkirchen","industry_code":"71.12.3","industry_scheme":"WZ2025"}'

{
    "results": [
        {
            "entity_id": "<32-char hex>",
            "name": "<string>",
            "registration": {
                "court": "<string>",
                "register_type": "<string>",
                "register_number": "<string>"
            },
            "address": {
                "house_number": "<string>",
                "street": "<string>",
                "postal_code": "<string>",
                "city": "<string>",
                "county": "<string>",
                "state": "<string>",
                "country": "<ISO country>",
                "coordinates": {
                    "latitude": "<float>",
                    "longitude": "<float>"
                }
            },
            "registration_date": "<ISO date>",
            "purpose": "<string>"
        }
    ],
    "total": "<int>",
    "meta": {
        "request_credit_cost": "<int>",
        "credits_remaining": "<int>"
    }
}

results[]

entity_id string

Stable 32-char hex identifier. Pass straight into /fetch-organization as `q`.

name string

Registered company name.

registration object

address object

Postal address with street, house_number, postal_code, city, county, state, country and coordinates (latitude/longitude).

registration_date date

Initial entry into the commercial register (ISO date).

purpose string

Stated business purpose (Unternehmensgegenstand).

top-level

total integer

Total result count for pagination.

meta.request_credit_cost integer

Credits actually charged for this call.

meta.credits_remaining integer

Account credit balance remaining after this call.

Location · Industry · Legal form · Full-text

Filters & master data — via search-organizations

City, industry, legal form, registration date: every argument combinable through the filters parameter. One REST endpoint, every German company.

Location & geo Filter by city, postal code, state and county through city, postal_code, state and county.
Industry (WZ2025) Industry segmentation via the official WZ2025 codes — industry_code combined with industry_scheme.
Legal form GmbH, AG, KG, OHG and more via legal_form_code.
Company size bs_company_size_category – small, medium, large based on balance-sheet totals.
Active status Restrict to active entries or include deleted companies via active.
Registration date Date ranges via registration_date_from and registration_date_to.
Full-text search Free-text query via the q parameter (min. 2 characters).
Pagination skip and limit (up to 30 results per call) for deep lists.
Master data per result entity_id, name, address, registration and registration_date – pass entity_id straight to /fetch-organization.

Run every filter live with an API key. Get an API key →

Code · AI-Agents · No-Code · Workflows

Drops into any stack

The search-organizations API speaks every mainstream client: REST, Python, Node, MCP for AI agents, n8n and webhook platforms.

REST API Simple GET request with the X-API-KEY header and JSON-encoded filters. Python requests, httpx or your favourite library — pass filters via json.dumps. Node.js fetch or axios with URLSearchParams. Works in edge, worker and browser runtimes. MCP Server Directly in Claude, Cursor or any MCP-aware AI client as the search_organizations tool. n8n Pre-built custom node for workflow automation — city, industry and size as filter inputs. Webhook Callable from Zapier, Make or any other webhook platform.

This list in your app

Grab an API key and filter every German company by city, industry, size and more — straight from your application. One REST endpoint, every result.

Get an API key

Filters & master data — via search-organizations

Drops into any stack

This list in your app

Cookie Settings

Customize Cookie Settings